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null | null | Non-human organisms that mainly consume plants/other primary producers are known as what? | omnivores | amphibians | carnivores | herbivores | null | null | null | null | null | null | null | null | |
null | null | In the microbiology lab, what technique refers to the procedures that are carried out under sterile conditions? | ionization | personal hygiene | experimental control | aseptic | In the microbiology lab, aseptic technique refers to the procedures that are carried out under sterile conditions. Scientists who study microbes are called microbiologists. Microbiologists must carry out their lab work using the aseptic technique to prevent microbial contamination of themselves, contamination of the en... | null | null | null | null | null | null | null | null |
null | null | Connecting a magnesium rod to an underground steel pipeline protects the pipeline from corrosion. because magnesium (e° = −2.37 v) is much more easily oxidized than iron (e° = −0.45 v), the mg rod acts as the anode in a what? | voltaic cell | anode cell | stimulation cell | galvanic cell | Connecting a magnesium rod to an underground steel pipeline protects the pipeline from corrosion. Because magnesium (E° = −2.37 V) is much more easily oxidized than iron (E° = −0.45 V), the Mg rod acts as the anode in a galvanic cell. The pipeline is therefore forced to act as the cathode at which oxygen is reduced. Th... | null | null | null | null | null | null | null | null |
null | null | Matrix is the term for the fluid-filled interior of what structure, where most of the cell’s atp is made? | enzyme | nucleus | Golgi apparatus | mitochondria | As the Figure below (a) and (b) shows, a mitochondrion has two phospholipids membranes. The smooth outer membrane separates the mitochondrion from the cytosol. The inner membrane has many folds, called cristae . These cristae greatly increase the membrane surface area for integral proteins. Many proteins involved in ce... | null | null | null | null | null | null | null | null |
null | null | Chitin, also found in the exoskeleton of insects, gives structural strength to the cell walls of fungi. the cell wall protects the cell from what? | starvation and predators | fermentation and predators | entrainment and predators | desiccation and predators | Like plant cells, fungal cells are surrounded by a thick cell wall; however, the rigid layers contain the complex polysaccharides chitin and glucan and not cellulose that is used by plants. Chitin, also found in the exoskeleton of insects, gives structural strength to the cell walls of fungi. The cell wall protects the... | null | null | null | null | null | null | null | null |
null | null | What is the term for air moving over earth’s surface? | tidal | humidity | spin cycle | wind | Wind is only air moving over Earth’s surface, but it can cause a lot of erosion. Look at Figure below . It will give you an idea of just how much erosion wind can cause. The dust storm in the photo occurred in Arizona. All that dust in the air was picked up and carried by the wind. The wind may carry the dust for hundr... | null | null | null | null | null | null | null | null |
null | null | Each of what paired organs is enclosed within a cavity surrounded by the pleura? | heart | bones | ovaries | lungs | Pleura of the Lungs Each lung is enclosed within a cavity that is surrounded by the pleura. The pleura (plural = pleurae) is a serous membrane that surrounds the lung. The right and left pleurae, which enclose the right and left lungs, respectively, are separated by the mediastinum. The pleurae consist of two layers. T... | null | null | null | null | null | null | null | null |
null | null | What are the best-known extinct vertebrates? | trilobites | snakes | trees | dinosaurs | Introduction Vertebrates are among the most recognizable organisms of the animal kingdom. More than 62,000 vertebrate species have been identified. The vertebrate species now living represent only a small portion of the vertebrates that have existed. The best-known extinct vertebrates are the dinosaurs, a unique group ... | null | null | null | null | null | null | null | null |
null | null | Centrioles help organize the chromosomes before cell division so that each daughter cell has the correct number of what? | receptors | ribosomes | cells | chromosomes | Centrioles are organelles involved in cell division. They help organize the chromosomes before cell division so that each daughter cell has the correct number of chromosomes after the cell divides. Centrioles are found only in animal cells and are located near the nucleus (see Figure above ). | null | null | null | null | null | null | null | null |
null | null | What development is less risky for the mother? | mutation | gastrointestinal | atypical | marsupial | Marsupial development is less risky for the mother. However, the embryo is fragile, so it may be less likely to survive than the fetus of a placental mammal. | null | null | null | null | null | null | null | null |
null | null | What does the term decay in chemistry refer to with regards to atoms? | separation of nuclei | pressures in nuclei | destruction of nuclei | changes in nuclei | You probably associate the term decay with images like the one above. But when it comes to atoms, decay has a different meaning. Decay in chemistry refers to changes in the nuclei of certain atoms. | null | null | null | null | null | null | null | null |
null | null | How does increasing the temperature of reactants affect the rate of their reaction? | it decreases it | it patterns it | it is unchanged | it increases it | When the temperature of reactants is higher, the rate of the reaction is faster. At higher temperatures, particles of reactants have more energy, so they move faster. As a result, they are more likely to bump into one another and to collide with greater force. For example, food spoils because of chemical reactions, and... | null | null | null | null | null | null | null | null |
null | null | What type of eclipse happens when a full moon moves through earth's shadow? | planetary | cycle | solar | lunar | Sometimes a full moon moves through Earth's shadow. This is a lunar eclipse ( Figure below ). During a total lunar eclipse, the Moon travels completely in Earth’s umbra. During a partial lunar eclipse, only a portion of the Moon enters Earth’s umbra. When the Moon passes through Earth’s penumbra, it is a penumbral ecli... | null | null | null | null | null | null | null | null |
null | null | Dynamite is an example of what type of potential energy? | thermal | carbon | mineral | chemical | Dynamite is another example of chemical potential energy. The major component of dynamite is nitroglycerin, a very unstable material. By mixing it with diatomaceous earth, the stability is increased and it is less likely to explode if it receives a physical shock. When ignited, the nitroglycerin explodes rapidly, relea... | null | null | null | null | null | null | null | null |
null | null | All the atoms of a given element have the same number what? | neutrons and protons | neutrons and electrons | cells and electrons | protons and electrons | All the atoms of a given element have the same number of protons and electrons, but they may vary in their numbers of neutrons. Atoms of the same element that differ in their numbers of neutrons are called isotopes. | null | null | null | null | null | null | null | null |
null | null | What structures located on chromosomes control characteristics of life and are passed from parents to offspring? | cells | eggs | axons | genes | Characteristics of life are controlled by genes, which are passed from parents to offspring, and are located on chromosomes, like the one shown here, that are found in every cell. The gene theory is one of the unifying principles of biology. | null | null | null | null | null | null | null | null |
null | null | The lattice energy is usually the most important energy factor in determining the stability of what? | saline compound | harmonic compound | magnetic compound | ionic compound | The lattice energy is usually the most important energy factor in determining the stability of an ionic compound. | null | null | null | null | null | null | null | null |
null | null | What kind of organisms helps hold soil in place to slow erosion? | animals | flowers | bacteria | plants | People remove a lot of vegetation. They log forests or prepare the land for farming or construction. Even just walking or riding your bike over the same place can kill the grass. But plants help to hold the soil in place ( Figure below ). Without plants to protect it, soil may be carried away by wind or running water. ... | null | null | null | null | null | null | null | null |
null | null | Water found on the surface of the earth is referred to as what? | runoff | groundwater | reservoir water | surface water | null | null | null | null | null | null | null | null | |
null | null | Which planet is named after the roman goddess of love? | Jupiter | Neptune | Mercury | venus | Named after the Roman goddess of love, Venus is the only planet named after a female. Venus is sometimes called Earth’s “sister planet. ” But just how similar is Venus to Earth? Venus is our nearest neighbor. Venus is most like Earth in size. | null | null | null | null | null | null | null | null |
null | null | In astronomy, what are so dense that not even light can escape their gravity? | red holes | black rods | dwarf stars | black holes | If the core remaining after a supernova is more than about 5 times the mass of the Sun, the core collapses to become a black hole . Black holes are so dense that not even light can escape their gravity. For that reason, we can't see black holes. How can we know something exists if radiation can't escape it? We know a b... | null | null | null | null | null | null | null | null |
null | null | What are the simplest organic compounds? | carbohydrates | proteins | enzymes | hydrocarbons | Summary Covalent inorganic compounds are named by a procedure similar to that used for ionic compounds, using prefixes to indicate the numbers of atoms in the molecular formula. The simplest organic compounds are the hydrocarbons, which containonly carbon and hydrogen. Alkanes contain only carbon–hydrogen and carbon–ca... | null | null | null | null | null | null | null | null |
null | null | Animals are classified according to morphological and developmental characteristics, such as a body plan. with the exception of sponges, the animal body plan is symmetrical. this means that their distribution of body parts is balanced along this? | ulna | skull | radius | axis | Classification Features of Animals Animals are classified according to morphological and developmental characteristics, such as a body plan. With the exception of sponges, the animal body plan is symmetrical. This means that their distribution of body parts is balanced along an axis. Additional characteristics that con... | null | null | null | null | null | null | null | null |
null | null | Competition that occurs between members of the same species, which improves the species’ adaptations, is called what? | adaptive behavior | interspecies competition | commensalism | intraspecific competition | Intraspecific competition occurs between members of the same species. It improves the species’ adaptations. | null | null | null | null | null | null | null | null |
null | null | When we were dealing with electrical effects, it was very useful to speak of an electric field that surrounded what? | sunlight charge | liquid charge | stellar charge | electrical charge | When we were dealing with electrical effects, it was very useful to speak of an electric field that surrounded an electric charge. In the same way, we can imagine a magnetic field surrounding a magnetic pole. The force that one magnet exerts on another can be described as the interaction between one magnet and the magn... | null | null | null | null | null | null | null | null |
null | null | Plants require air, water, nutrients, and what in order to live and survive? | entertainment | money | gravity | light | null | null | null | null | null | null | null | null | |
null | null | Exothermic reactions, like all chemical reactions, require what to get started? | specific energy | surface energy | membrane energy | activation energy | All chemical reactions, including exothermic reactions, need activation energy to get started. | null | null | null | null | null | null | null | null |
null | null | What broad group of animals are the first true tetrapods, vertebrates with four limbs? | mammals | fish | reptiles | amphibians | Amphibians are the first true tetrapods , or vertebrates with four limbs. Amphibians have less variation in size than fish, ranging in length from 1 centimeter (2.5 inches) to 1.5 meters (about 5 feet). They generally have moist skin without scales. Their skin contains keratin , a tough, fibrous protein found in the sk... | null | null | null | null | null | null | null | null |
null | null | In most fungi, the haploid nuclei contributed by each parent do not do what right away? | vaporize | filter | disperse | fuse | null | null | null | null | null | null | null | null | |
null | null | What is telomere shortening associated with? | changing | sleeping | reducing | aging | Telomerase is not active in adult somatic cells. Adult somatic cells that undergo cell division continue to have their telomeres shortened. This essentially means that telomere shortening is associated with aging. In 2010, scientists found [1] that telomerase can reverse some age-related conditions in mice, and this ma... | null | null | null | null | null | null | null | null |
null | null | What gas is released when dead organisms and other organic materials decompose? | nitrous oxide | hydrogen peroxide | carbon monoxide | carbon dioxide | Carbon dioxide is given off when dead organisms and other organic materials decompose. | null | null | null | null | null | null | null | null |
null | null | What type of lens is thicker at the edges than it is in the middle? | glass lens | convex lens | surface lens | concave lens | A concave lens is thicker at the edges than it is in the middle. This causes rays of light to diverge. The light forms a virtual image that is right-side up and smaller than the object. | null | null | null | null | null | null | null | null |
null | null | A collapsing nebula leads to what process? | chemical reaction | nuclear reaction | destructive fusion | nuclear fusion | Stars form from clouds of gas and dust called nebulas. Nebulas collapse until nuclear fusion starts. | null | null | null | null | null | null | null | null |
null | null | Lenses that focus light are called what? | sensing lenses | active lenses | powering lenses | converging lenses | Lenses , made from curved pieces of glass, focus or de-focus light as it passes through. Lenses that focus light are called converging lenses, and these are the ones used to make telescopes and cameras. Lenses that de-focus light are called diverging lenses. | null | null | null | null | null | null | null | null |
null | null | What happens to the pressure when more gas is added to a rigid container? | Higher | occurs | changes | increases | The acceleration of the car is in the same direction as the velocity. | null | null | null | null | null | null | null | null |
null | null | Often represented by an arrow, a vector is a measurement that has both size and what? | reason | pressure | location | direction | When both distance and direction are considered, motion can be represented by a vector. A vector is a measurement that has both size and direction. It may be represented by an arrow. If you are representing motion with an arrow, the length of the arrow represents distance, and the way the arrow points represents direct... | null | null | null | null | null | null | null | null |
null | null | A solenoid wrapped around a bar of iron or other ferromagnetic material forms what? | compress | impoundment | compass | electromagnet | Solenoids are the basis of electromagnets. An electromagnet is a solenoid wrapped around a bar of iron or other ferromagnetic material (see Figure below ). The electromagnetic field of the solenoid magnetizes the iron bar by aligning its magnetic domains. The combined magnetic force of the magnetized iron bar and the w... | null | null | null | null | null | null | null | null |
null | null | Enzymes can catalyze up to several million reactions per what? | day | minute | hour | second | Enzymes are extremely efficient in speeding up biochemical reactions. They can catalyze up to several million reactions per second. As a result, the difference in rates of biochemical reactions with and without enzymes may be enormous. A typical biochemical reaction might take hours or even days to occur under normal c... | null | null | null | null | null | null | null | null |
null | null | Unipolar, bipolar, multipolar, and pseudounipolar are the four basic types of what? | electrons | ions | protons | neurons | While there are many defined neuron cell subtypes, neurons are broadly divided into four basic types: unipolar, bipolar, multipolar, and pseudounipolar. Figure 35.5 illustrates these four basic neuron types. Unipolar neurons have only one structure that extends away from the soma. These neurons are not found in vertebr... | null | null | null | null | null | null | null | null |
null | null | How many families are known quarks divided into? | four | two | five | three | The known quarks are divided into three families, low energy, medium energy, and high energy. | null | null | null | null | null | null | null | null |
null | null | The nervous system has two main parts, called the central nervous system and the what? | obsolete nervous system | functional nervious system | useful nervous system | peripheral nervous system | The nervous system has two main parts, called the central nervous system and the peripheral nervous system. The peripheral nervous system is described later in this lesson. The central nervous system is shown in Figure below . It includes the brain and spinal cord. | null | null | null | null | null | null | null | null |
null | null | What makes up the dense outer layer of bones? | plasma | adipose tissue | ligaments | compact bone | Compact bone makes up the dense outer layer of bone. It is very hard and strong. | null | null | null | null | null | null | null | null |
null | null | What type of behaviors are rigid and predictable, and usually involve basic life functions? | impulsive behaviors | diverse behaviors | protective behaviors | innate behaviors | Innate behaviors are rigid and predictable. All members of the species perform the behaviors in the same way. Innate behaviors usually involve basic life functions, such as finding food or caring for offspring. Several examples are shown in Figure below . If an animal were to perform such important behaviors incorrectl... | null | null | null | null | null | null | null | null |
null | null | Yeasts, molds, and mushrooms are all different kinds of what? | fossil | pollen | bacteria | fungi | Yeasts, molds, and mushrooms are all different kinds of fungi. There may be as many as 1.5 million species of fungi ( Figure below ). You can easily see bread mold and mushrooms without a microscope, but most fungi you cannot see. Fungi are either too small to be seen without a microscope, or they live where you cannot... | null | null | null | null | null | null | null | null |
null | null | What is the term for the preserved remains or traces of organisms that lived in the past? | detritis | corals | bones | fossils | Fossils are the preserved remains or traces of organisms that lived in the past. The soft parts of organisms almost always decompose quickly after death. On occasion, the hard parts—mainly bones, teeth, or shells—remain long enough to mineralize and form fossils. An example of a complete fossil skeleton is shown in Fig... | null | null | null | null | null | null | null | null |
null | null | What process, which is analogous to mitosis, is a series of events that arrange and separate chromosomes and chromatids into daughter cells? | digestion | apoptosis | inhibition | meiosis | CHAPTER SUMMARY 11.1 The Process of Meiosis Sexual reproduction requires that diploid organisms produce haploid cells that can fuse during fertilization to form diploid offspring. As with mitosis, DNA replication occurs prior to meiosis during the S-phase of the cell cycle. Meiosis is a series of events that arrange an... | null | null | null | null | null | null | null | null |
null | null | All of the elements in group 9 have nine of which electrons? | gradient | shell | ionic | valence | All of the elements in group 9 have nine valence electrons. | null | null | null | null | null | null | null | null |
null | null | The force of attraction between a positively charged metal ion and the valence electrons it shares with other ions of the metal is called? | temporal bond | ionic bond | metallic yield | metallic bond | A metallic bond is the force of attraction between a positively charged metal ion and the valence electrons it shares with other ions of the metal. The electrons move freely around the positive ions, which form a lattice-like structure. | null | null | null | null | null | null | null | null |
null | null | When a car is brought to a stop by friction on level ground, it loses what? | mass energy | residual energy | exhibit energy | kinetic energy | How Nonconservative Forces Affect Mechanical Energy Mechanical energy may not be conserved when nonconservative forces act. For example, when a car is brought to a stop by friction on level ground, it loses kinetic energy, which is dissipated as thermal energy, reducing its mechanical energy. Figure 7.15 compares the e... | null | null | null | null | null | null | null | null |
null | null | What system of the body is responsible for transmitting, processing, and responding to most of the sensory information that is created by various stimuli? | attentive system | respiratory system | circulatory system | nervous system | Animals can detect environmental stimuli, such as light, sound, and touch. Stimuli are detected by sensory nerve cells. The information is transmitted and processed by the nervous system. The nervous system, in turn, may direct the body to respond. Animal Eyes at http://www. surenmanvelyan. com/eyes/animal-eyes/ has 26... | null | null | null | null | null | null | null | null |
null | null | Do vascular or nonvascular plants lack tracheids? | both do | vascular | neither do | nonvascular | null | null | null | null | null | null | null | null | |
null | null | When the earth is between the moon and the sun, what type of moon shows? | crescent moon | waning moon | half moon | a full moon | A full moon occurs when the whole side facing Earth is lit. This happens when Earth is between the Moon and the Sun. About one week later, the Moon enters the quarter-moon phase. Only half of the Moon’s lit surface is visible from Earth, so it appears as a half circle. When the Moon moves between Earth and the Sun, the... | null | null | null | null | null | null | null | null |
null | null | The stored chemical energy of trees and other plants is called what? | byproduct energy | decomposition energy | biocomposte energy | biomass energy | The stored chemical energy of trees and other plants is called biomass energy. When plant materials are burned, they produce thermal energy that can be used for heating, cooking, or generating electricity. Biomass—especially wood—is an important energy source in countries where most people can’t afford fossil fuels. So... | null | null | null | null | null | null | null | null |
null | null | What is the star nearest the earth named? | alpha centauri | apollinaris centauri | andromeda centauri | proxima centauri | Astronomers are used to really big numbers. While the moon is only 406,697 km from earth at its maximum distance, the sun is much further away (150 million km). Proxima Centauri, the star nearest the earth, is 39, 900, 000, 000, 000 km away and we have just started on long distances. On the other end of the scale, some... | null | null | null | null | null | null | null | null |
null | null | What are the majority of solution properties dependent upon? | acid state of solute | similar state of solute | gas state of solute | chemical state of solute | The properties of a solution are different from those of either the pure solute(s) or solvent. Many solution properties are dependent upon the chemical identity of the solute. Compared to pure water, a solution of hydrogen chloride is more acidic, a solution of ammonia is more basic, a solution of sodium chloride is mo... | null | null | null | null | null | null | null | null |
null | null | What must be combined with a halogen to give it a positive oxidation number? | carbon | nitrogen | calcium | oxygen | Halogens (Cl, Br, I) have negative oxidation numbers when they form halide compounds. When combined with oxygen, they have positive numbers. In the chlorate ion (ClO 3 - ), the oxidation number of Cl +5, and the oxidation number of O is -2. | null | null | null | null | null | null | null | null |
null | null | Hormones are often regulated through what? | intensity loops | alternating loops | response loops | feedback loops | null | null | null | null | null | null | null | null | |
null | null | Surging hormones will cause adolescents to have what? | bulging muscles | blackouts | growth spurts | mood swings | Adolescents may have mood swings because of surging hormones . | null | null | null | null | null | null | null | null |
null | null | What is the term for the force that a magnet exerts on certain materials? | potential force | positive force | gravitational force | magnetic force | The force that a magnet exerts on certain materials is called magnetic force . Like electric force, magnetic force is exerted over a distance and includes forces of attraction and repulsion. North and south poles of two magnets attract each other, while two north poles or two south poles repel each other. | null | null | null | null | null | null | null | null |
null | null | What cells does the skeletal system make? | brain cells | Osteoclast | Dendritic cells | blood cells | The skeletal system makes blood cells. Most blood cells are produced inside certain types of bones. | null | null | null | null | null | null | null | null |
null | null | When a stream or river slows down, it starts dropping its what? | pollutants | fragments | organisms | sediments | When a stream or river slows down, it starts dropping its sediments. Larger sediments are dropped in steep areas, but smaller sediments can still be carried. Smaller sediments are dropped as the slope becomes less steep. | null | null | null | null | null | null | null | null |
null | null | What process, which is in many ways the opposite of photosynthesis, shows the interdependence of producers and consumers? | osmosis | primarily respiration | decomposition | cellular respiration | Cellular respiration, in many ways the opposite of photosynthesis, shows the interdependence of producers and consumers. Combined, the two equations demonstrate how energy flows and the carbon and oxygen cycle between organisms and environment. | null | null | null | null | null | null | null | null |
null | null | Which membranous organelles in a cell sequence enzyme and electron molecules for efficient cellular respiration? | bacterial | glucose | protons | mitochondria | Mitochondria, shown here as the green ovals in this animal cell, are membranous organelles which sequence enzyme and electron carrier molecules to make cellular respiration highly efficient. Mitochondria have both an inner and outer membrane, with a matrix inside the inner membrane. The inner membrane has many internal... | null | null | null | null | null | null | null | null |
null | null | In a plant, the flower contains what? | bud and stem | bees and blossoms | seed and leaves | pollen and eggs | null | null | null | null | null | null | null | null | |
null | null | What forms when one substances dissolves in another? | complex | a transition | concentrate | a solution | A solution forms when one substance dissolves in another. The substance that dissolves is called the solute. The substance that dissolves it is called the solvent. | null | null | null | null | null | null | null | null |
null | null | What are thought to have evolved at least 200 million years ago from gymnosperms like gnetae? | deciduous trees | yeasts | cone-bearing plants | flowering plants | Flowering plants are thought to have evolved at least 200 million years ago from gymnosperms like Gnetae. The earliest known fossils of flowering plants are about 125 million years old. The fossil flowers have male and female reproductive organs but no petals or sepals. | null | null | null | null | null | null | null | null |
null | null | The chemical and/or physical agents that cause mutations are called what? | genes | dioxins | organelles | mutagens | mutation. The chemical and/or physical agents that cause mutations are called mutagens. Diseases that occur due to mutations in critical DNA sequences are referred to as genetic diseases. Viruses are infectious agents composed of a tightly packed central core of nucleic acids enclosed by a protective shell of proteins.... | null | null | null | null | null | null | null | null |
null | null | What is the force that opposes motion between two surfaces that are touching? | gravity | tension | vibration | friction | Friction is a force that opposes motion between two surfaces that are touching. Friction occurs because no surface is perfectly smooth. Friction is greater when objects have rougher surfaces or are heavier so they press together with greater force. | null | null | null | null | null | null | null | null |
null | null | Skeletal, cardiac, and smooth are all types of what? | Connective | Nervous | Epithelial | muscle | There are three different types of muscle tissue in the human body: cardiac, smooth, and skeletal muscle tissues. All three types consist mainly of muscle fibers, but the fibers have different arrangements. You can see how each type of muscle tissue looks in Figure below . | null | null | null | null | null | null | null | null |
null | null | The speed of a wave through connected harmonic oscillators depends on the distance between them, the spring constant, and the what? | temperature | density | concentrations | mass | Most wave media act like a series of connected oscillators. For instance, a rope can be thought of as a large number of masses (molecules) connected by springs (intermolecular forces). The speed of a wave through connected harmonic oscillators depends on the distance between them, the spring constant, and the mass. In ... | null | null | null | null | null | null | null | null |
null | null | Traits may also be controlled by multiple alleles or multiple what? | eggs | chromosomes | lesions | genes | Inheritance is more complex for traits in which there is codominance or incomplete dominance. Traits may also be controlled by multiple alleles or multiple genes. Many traits are influenced by the environment as well. | null | null | null | null | null | null | null | null |
null | null | How many atoms does water contain? | 9 | 4 | 6 | 3 | Water, like carbon, has a special role in living things. It is needed by all known forms of life. Water is a simple molecule, containing just three atoms. Nonetheless, water’s structure gives it unique properties that help explain why it is vital to all living organisms. | null | null | null | null | null | null | null | null |
null | null | What is the only light that people can see? | UV light | spectrum light | infrared light | visible light | Visible light consists of a very narrow range of wavelengths that falls between infrared light and ultraviolet light. It is the only light that people can see. Different wavelengths of visible light appear as different colors. | null | null | null | null | null | null | null | null |
null | null | What is the name of the system that consists of a hierarchy of taxa, from the kingdom to the species? | zoology | Bohr's law | Mendelian system | linnaean system | The Linnaean system is based on similarities in obvious physical traits. It consists of a hierarchy of taxa, from the kingdom to the species. | null | null | null | null | null | null | null | null |
null | null | If the dna from all 46 chromosomes in a human cell nucleus was laid out end to end, it would measure approximately how long? | one meter | three meters | four meters | two meters | Eukaryotic Chromosomal Structure and Compaction If the DNA from all 46 chromosomes in a human cell nucleus was laid out end to end, it would measure approximately two meters; however, its diameter would be only 2 nm. Considering that the size of a typical human cell is about 10 µm (100,000 cells lined up to equal one m... | null | null | null | null | null | null | null | null |
null | null | What is a mixture of a solute in a solvent called? | transition | link | structure | solution | Imagine you have a cup that has 100ml water, and you add 15g of table sugar to the water. The sugar dissolves and the mixture that is now in the cup is made up of a solute (the sugar) that is dissolved in the solvent (the water). The mixture of a solute in a solvent is called a solution . | null | null | null | null | null | null | null | null |
null | null | Silver is an example of a mineral containing only one kind of what? | chemical | matter | mass | element | All minerals have a definite chemical makeup. A few minerals are made of only one kind of element. Silver is a mineral made only of silver atoms. Diamond and graphite are both made only of the element carbon. | null | null | null | null | null | null | null | null |
null | null | What particles ancient greeks propose that matter consists of ? | ether | ions | molecules | atoms | Summary 2.1 Early Ideas in Atomic Theory The ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms of all other elements, and that atoms of different elements can combine in fixe... | null | null | null | null | null | null | null | null |
null | null | Repolarization occurs when the membrane potential begins to move back toward its resting what? | tension | charge | resistance | voltage | As the membrane potential reaches +30 mV, other voltage-gated channels are opening in the membrane. These channels are specific for the potassium ion. A concentration gradient acts on K+, as well. As K+ starts to leave the cell, taking a positive charge with it, the membrane potential begins to move back toward its res... | null | null | null | null | null | null | null | null |
null | null | Mollusks have a true coelom and a complete what? | tissues system | skeletal system | nerve system | digestive system | Mollusks have a true coelom and complete digestive system. They also have circulatory and excretory systems. They have a heart that pumps blood, and organs that filter out wastes from the blood. | null | null | null | null | null | null | null | null |
null | null | Which organelles, made of protein and ribosomal rna, build cellular proteins in the cytoplasm? | chromosomes | chloroplasts | dna | ribosomes | The nucleus of many cells also contains an organelle called a nucleolus , shown in Figure below . The nucleolus is mainly involved in the assembly of ribosomes. Ribosomes are organelles made of protein and ribosomal RNA (rRNA), and they build cellular proteins in the cytoplasm. The function of the rRNA is to provide a ... | null | null | null | null | null | null | null | null |
null | null | What type of matter makes up most of the universe? | gas | carbon | liquid | plasma | Can you guess what this picture shows? The purple and blue "flames" are matter in a particular state. You’re probably familiar with the states of matter most common on Earth — solids, liquids, and gases. But these "flames" are a state of matter called plasma. This plasma ball was made by humans. Plasma also occurs in n... | null | null | null | null | null | null | null | null |
null | null | Most mammals are viviparous, which refers to what reproductive result? | laying eggs | identical twins | spawning | live birth | Most mammals are viviparous. Their young are born live. They are born either as relatively large, well-developed fetuses or as tiny, immature embryos. Mammals that are viviparous are called therian mammals . Only a few mammals lay eggs instead of giving birth to an infant or embryo. | null | null | null | null | null | null | null | null |
null | null | Proteins are polymers of what kind of acids? | acetic | lipids | lactic | amino | Proteins are polymers of amino acids, which act as the monomers. | null | null | null | null | null | null | null | null |
null | null | What is the official name for the study of life? | botany | chemistry | geology | biology | The study of biology is the study of life. Concept Biology Advanced is the CK-12 Foundation's most extensive material describing the study of life. Concept Biology Advanced presents biology as a set of 18 concepts, with each concept centered around a specific category, such as cell biology or plants. Each concept is co... | null | null | null | null | null | null | null | null |
null | null | What does an invertebrate, like a snail, not have? | a heart | reproductive organs | eyes | backbone | Snails are an example of invertebrates, animals without a backbone. | null | null | null | null | null | null | null | null |
null | null | What is the dinosaur genus that's closest to modern birds? | Rapter | sauropods | diplodocus | deinonychus | Deinonychus is the genus name of an extinct dinosaur that is considered to be one of the closest non-bird relatives of modern birds. It lived about 110 million years ago in what is now North America. Deinonychus was a predatory carnivore with many bird-like features. For example, it had feathers and wings. It also had ... | null | null | null | null | null | null | null | null |
null | null | In what type of organisms are daughter cells individuals? | hematopoietic organisms | multicellular organisms | macroscopic organisms | unicellular organisms | 6.4 | Prokaryotic Cell Division By the end of this section, you will be able to: • Describe the process of binary fission in prokaryotes • Explain how FtsZ and tubulin proteins are examples of homology Prokaryotes such as bacteria propagate by binary fission. For unicellular organisms, cell division is the only method ... | null | null | null | null | null | null | null | null |
null | null | What group was long considered part of the plant kingdom because of obvious similarities; both are immobile, have cell walls, and grow in soil? | bacteria | mosses | coral | fungi | For a long time, scientists considered fungi to be members of the plant kingdom because they have obvious similarities with plants. Both fungi and plants are immobile, have cell walls, and grow in soil. Some fungi, such as lichens, even look like plants (see Figure below ). | null | null | null | null | null | null | null | null |
null | null | What type of waves transmit the energy of an earthquake? | volcanic waves | tectonic waves | sonic waves | seismic waves | An earthquake is sudden ground movement. This movement is caused by the sudden release of the energy stored in rocks. An earthquake happens when so much stress builds up in the rocks that the rocks break. An earthquake’s energy is transmitted by seismic waves. Each year, there are more than 150,000 earthquakes strong e... | null | null | null | null | null | null | null | null |
null | null | In our bodies, the chest cavity is a clear example of a system at what? | default | rest | scale | resonance | It is interesting that the widths of the resonance curves shown in Figure 16.27 depend on damping: the less the damping, the narrower the resonance. The message is that if you want a driven oscillator to resonate at a very specific frequency, you need as little damping as possible. Little damping is the case for piano ... | null | null | null | null | null | null | null | null |
null | null | How do prokaryotic cells divide? | multiple fission | Fusion | function fission | binary fission | Prokaryotic cells grow to a certain size. Then they divide by binary fission. This is a type of asexual reproduction. It produces genetically identical offspring. Genetic transfer increases genetic variation in prokaryotes. | null | null | null | null | null | null | null | null |
null | null | What is the term for a series of biochemical reactions by which an organism converts a given reactant to a specific end product? | hydrogen pathway | internal pathway | direct pathway | metabolic pathway | A metabolic pathway is a series of biochemical reactions by which an organism converts a given reactant to a specific end product. As you will learn in Section 20.5 "Stage II of Carbohydrate Catabolism" through Section 20.7 "Stage II of Protein Catabolism", there are specific metabolic pathways—which are different for ... | null | null | null | null | null | null | null | null |
null | null | Exemplified by sea stars and sand dollars, echinoderms have a calcareous structure developed by pigment cells and made of ossicles, which is called what? | thorax | hydrostatic skeleton | exoskeleton | endoskeleton | Phylum Echinodermata Echinodermata are so named owing to their spiny skin (from the Greek “echinos” meaning “spiny” and “dermos” meaning “skin”), and this phylum is a collection of about 7,000 described living species. Echinodermata are exclusively marine organisms. Sea stars (Figure 28.44), sea cucumbers, sea urchins,... | null | null | null | null | null | null | null | null |
null | null | What phase does the nuclear envelope begin to break down? | interphase | nitrogenase i | pasiphaë i | prophase i | Prophase I: The nuclear envelope begins to break down, and the chromosomes condense. Centrioles start moving to opposite poles of the cell, and a spindle begins to form. Importantly, homologous chromosomes pair up, which is unique to prophase I. In prophase of mitosis and meiosis II, homologous chromosomes do not form ... | null | null | null | null | null | null | null | null |
null | null | What are formed when cells from the male and female parts of the plant combine? | atoms. | varieties | trees | seeds | null | null | null | null | null | null | null | null | |
null | null | What is another name for anther pollen sacs? | Gametangia | ganglia | Megasporangia | microsporangia | null | null | null | null | null | null | null | null | |
null | null | What is released to lubricate the vagina to facilitate intercourse? | semen | urine | blood | vaginal secretions | The vagina is a muscular tube that serves several purposes. It allows menstrual flow to leave the body. It is the receptacle for the penis during intercourse and the vessel for the delivery of offspring. It is lined by stratified squamous epithelial cells to protect the underlying tissue. Sexual Response during Interco... | null | null | null | null | null | null | null | null |
null | null | Cnidarians are an example of organisms that possess a simple type of what system, used for sensing touch? | bacterial system | circulatory system | lymphatic system | nervous system | Cnidarians have a simple nervous system. It consists of a net of nerves that can sense touch. You can see a sketch of the nerve net in a hydra in Figure below . Some cnidarians also have other sensory structures. For example, jellyfish have light-sensing structures and gravity-sensing structures. | null | null | null | null | null | null | null | null |
null | null | What can we learn about a wave by finding the product of the wavelength and frequency? | type | decibels | volume | speed | The speed of a wave is a product of its wavelength and frequency. Because all electromagnetic waves travel at the same speed through space, a wave with a shorter wavelength must have a higher frequency, and vice versa. This relationship is represented by the equation:. | null | null | null | null | null | null | null | null |
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