Topic Test

Question 1

Which of the following is required for photosynthesis to take place?a.sugarb.oxygenc.ATPd.water

Revolt · Accepted Answer

D

Question 2

Which of the following statements about C3 carbon fixation is true?a.C3 carbon fixation is an adaptation for plants exposed to high light intensity.b.C3 carbon fixation occurs in more plants than C4 carbon fixation.c.C3 carbon fixation is more common in areas of high temperatures than C4 carbon fixation.d.C3 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.

Revolt · Accepted Answer

B

Question 3

Which of the following statements about energy and trophic levels is not true?a.The amount of available energy decreases at each higher trophic level.b.The energy conversion efficiency decreases at higher trophic levels.c.The net production of energy is higher at lower trophic levels.d.None of the above

Revolt · Accepted Answer

B

Question 4

Which of the following is true about the efficiency of energy transfer in an ecosystem?a.The more energy the organism requires, the more efficient the energy transfer.b.All energy transfers have the same efficiencies.c.The less energy the organism requires, the more efficient the energy transfer.d.The most efficient energy transfers are in large, warm-blooded animals.

Revolt · Accepted Answer

C

Question 5

Which of the following best explains why ecosystems need a continual influx of new energy?a.Photosynthesis feeds herbivores, carnivores, and decomposers.b.As energy is recycled, a small amount is lost as heat.c.Energy flows through an ecosystem and cannot be recycled.d.Cellular respiration does not feed back into other processes.

Revolt · Accepted Answer

C

Question 6

Which of the following organisms is located only in the 3rd trophic level of the soil food web?a.bacteriab.fungic.protozoad.nematodes

Revolt · Accepted Answer

C

Question 7

Which of the following is not true about energy in ecosystems?a.Energy is transferred between organisms.b.Energy is recycled after flowing through ecosystems.c.Most energy enters ecosystems as sunlight.d.Ecosystems require a continuous influx of new energy.

Revolt · Accepted Answer

B

Question 8

Which of the following is not a direct fate of the energy flowing through photosynthesis?a.carnivoresb.cellular respirationc.herbivoresd.heat sinks

Revolt · Accepted Answer

A

Question 9

Ecosystem productivity is principally limited by _______.a.sunlight and nutrient availabilityb.water and nutrient availabilityc.the availability of time and nutrientsd.none of the above

Revolt · Accepted Answer

A

Question 10

Explain how entropy relates to the amount of energy that is available in the different trophic levels of a food chain.

Revolt · Accepted Answer

Entropy increases with every energy transfer between trophic levels. Because usable energy is lost as heat, less energy remains available for work at higher trophic levels.

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