Biology final review quizzes

Why is phosphorus important to the ecosystem? A. All of these resources are reasons B. Phosphorus is critical for the structure of nucleic acids C. Phosphorus is a necessary component for the formation of bone D. Phosphorus is an important component of cell membranes E. Phosphorus is a component of teeth

A. All of these are correct

Which of the following statements about biomagnification is correct? A. DDT is absorbed by small animals, such as zooplankton, and then moves up the food chain B. DDT moves down the food chain and is diluted in higher trophic levels, such as predatory birds C. Animals can degrade DDT enzymatically and secrete it in their urine, causing DDT levels to accumulate in waterways D.DDT is insoluble and easily excreted in urine, allowing it to accumulate inside animal bodies

A. DDT is absorbed by small animals, such as zooplankton, and then moves up the food chain

What was the unintended consequences for birds when trees infected with Dutch elm disease were sprayed with DDT? select all that are correct A. Leaves coated in DDT fell to the ground and were eaten by earthworms B. Birds died when they ate earthworms with accumulated levels of DDT C. Robins and other birds absorbed DDT as they nested in trees, which caused their eggs to have thin, weak shells D. earthworms absorbed DDT from the water supply, which poisoned the birds that ate them

A. Leaves coated in DDT fell to the ground and were eaten by earthworms B. Birds died when they ate earthworms with accumulated levels of DDT

An important role of nitrogen-fixing bacteria is to... A. convert gaseous nitrogen into ammonia B. assist plants with photosynthesis C. assist in the decomposition of prairie grass D. decompose nitrogen-ruch fungi E. return nitrogen to the soil by decomposing bison waste.

A. convert gaseous nitrogen Into ammonia

Which statement is true about energy transfer?A.Some of the molecules consumed by organisms are never incorporated into their tissues and is lost in feces. B. Vegetarianism is equally as energy efficient as eating meat. C. All of the energy from one trophic level is transferred to the next trophic level. D. Indigestible plant parts transfer energy to the next trophic level. E. all of the above

A.Some of the molecules consumed by organisms are never incorporated into their tissues and is lost in feces.

Which of the following is the result of the one-way path of energy flow through the ecosystem? A.Tertiary consumers are often rare in an ecosystem. B.The number of predators outnumbers the number of producers. C.If a secondary consumer is removed from the ecosystem, another can easily replace it. D. The one-way path of energy flow does not impact the ecosystem. E. All of these are impacts of the one-way path of energy flow through the ecosystem.

A.Tertiary consumers are often rare in an ecosystem.

In aquatic environments, DDT is converted to DDE, a chemical that affects the reproduction in predatory birds such as pelicans and eagles. In the 1950s, populations of these predatory birds plummeted. How did DDE end up affecting eagles? A. Eagles and other predatory birds often swim in coastal waterways B. DDE is first absorbed from the water by zooplankton, then moves up the food chain to higher trophic levels, eventually accumulating in predatory birds that feed on fish. C. the roots of plants pull DDE up into the plants, which then produce contaminated seeds that are eaten by birds D.DDE is volatile and contaminates moist coastal air in the environments where predatory birds hunt and nest. E. all of the above

B. DDE is first absorbed from the water by zooplankton, then moves up the food chain to higher trophic levels, eventually accumulating in predatory birds that feed on fish.

Why is it more energetically efficient to be a vegetarian than to eat meat? A. it is easier to extract energy from plants than from animal sources B. No energy is lost to another animal's metabolism when a person eats plants C. plants contains more energy than meat since they are at a lower trophic level D. a person burns less energy digesting plants than digesting meat E. it takes less effort to gather plants to eat than to prepare and cook meat

B. No energy is lost to another animal's metabolism when a person eats plants

Why is water considered a renewable resource? A. humans have no significant impact on water supplies B. Water resources are continually replenished by the water cycle C. There is sufficient groundwater for the foreseeable future D. laws concerning water rights require that it be so designated.

B. Water resources are continually replenished by the water cycle

Why is the sun the ultimate source of energy for all carnivores? A.When energy from the sun heats water, animals at all trophic levels can absorb the energy contained in the water each time they take a drink. B.Some of the energy produced during photosynthesis passes from one trophic level to the next as herbivores eat producers and are then eaten by carnivores. C. As consumers, carnivores get some of their energy directly from the sun through photosynthesis and the rest by hunting and eating other animals. D. Producers eat plants that contain solar energy gathered during photosynthesis, and the energy passes to carnivores when they eat the producers. E. Carnivores are able to absorb heat from the sun during the daytime and use it to increase their metabolic rate, allowing them to hunt more effectively.

B.Some of the energy produced during photosynthesis passes from one trophic level to the next as herbivores eat producers and are then eaten by carnivores.

How did Rachel Carson account for the public's blind acceptance of DDT without scientific evidence of its safety? Select all correct answers A.Carson said that people didn't care enough to think about dangers B. Carson wrote in her book that people feared insects, and diseases carried by insects, too intensely to reduce the use of DDT C. Carson said that people put unquestioned faith in the power of experts to bend nature to their will with technology D.Carson reasoned that individuals in positions of power made all the decisions without being informed of the associated risks

C. Carson said that people put unquestioned faith in the power of experts to bend nature to their will with technology D.Carson reasoned that individuals in positions of power made all the decisions without being informed of the associated risks

Which of the following biomes covers the greatest amount of earth's surface? A. grassland B. taiga C. oceans D. desert E. tropical forest

C. oceans

After harvesting and selling a crop of corn, a farmer collects the corn stalks and feeds them to her cows. Why should the farmer add fertilizer containing nitrogen and phosphorus to the field before growing another crop? A.Nitrogen and phosphorus move out of the air and into the soil very slowly, so fertilizer is needed for the next crop. B. Soil weathering does not occur quickly enough to replace the nitrogen and phosphorus lost when the crop was harvested. C. The Haber-Bosch process makes fertilizer with higher quality nitrogen and phosphorus than occurs naturally in soil. D. The nitrogen and phosphorus the plants took from the soil will not return to the field through decomposition. E. The bacteria in the field use up the nitrogen and phosphorus remaining in the soil after the crop is harvested.

D. The nitrogen and phosphorus the plants took from the soil will not return to the field through decomposition.

To ensure a constant supply of fresh water, which statement about the water cycle must be true? A.The water cycle can be reversed to replenish fresh water when fresh water supplies decrease. B. Water is a renewable resource, so the rate of water withdrawal from natural sources has little effect on the supply of fresh water. C.The rate of water withdrawal from natural sources must be greater than the rate of replacement. D. When fresh water supplies decrease, water is added to the cycle through the absorption of microscopic ice meteors. E. The rate of water withdrawal from natural sources must be less than the rate of replacement.

E. The rate of water withdrawal from natural sources must be less than the rate of replacement.

How did DDT become accepted and popularized without knowing wether it was safe? A. DDT was successfully used by public health officials to combat illnesses such as malaria, which is spread by mosquitoes B.DDT was advertised by chemical companies as an "aid to domestic comfort and tranquility" and neighborhoods were sprayed en masse as children played happily in the clouds of chemicals C. DDT was first used in world war ll to combat typhus fever, which is carried by insects, in the US D.DDT was successfully used by farmers to protect their crops from the insects E. all of the above

E. all of the above

What type of biome is characterized by evergreen trees, with long and cold winters and only short summers? A. Taiga B. Tundra C. Temperate grasslands D. Savana

Taiga

What is the major feature that defines a biome? A. its an animal life B. all of these C. its a plants life D. its soil microorganisms

its a plants life

What type of biome has short evergreen trees and shrubs with leathery leaves and is characterized by long, hot, dry summers and cool, damp winters? A. mediterraneans B. Taiga C. Tundra D. savana E. desert

mediterraneans

Which of these must be converted from an atmospheric gas into a form that plants can take up from soil? A. nitrogen B. phosphorus C. water D. carbon dioxide E. oxygen

nitrogen