Energy Transfer Answers

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21
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Which of the following levels is the most efficient at energy conversion?

A
producers
B
primary consumers
C
secondary consumers
D
tertiary consumers
22
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The relationship between the amount of energy available for use and the amount of entropy in a food chain differs between trophic levels. Why would the amount of entropy increase from one trophic level to another in a food chain or energy pyramid?

A
the available energy from one trophic level to another increases
B
energy is lost at each level as heat, which increases randomization
C
the amount of biomass decreases from one trophic level to another
D
the available energy at each level may either increase or decrease, creating randomization
23

The amount of available energy changes between the trophic levels found in a food chain or energy pyramid. Photos (left to right) by Mehmet Karatay, Jens Buurgaard Nielsen, Furryscaly, and Walter Siegmund In the food chain shown, which of the following changes between trophic levels would have the highest energy conversion efficiency?

Question illustration
A
leaf to mouse
B
mouse to snake
C
snake to hawk
D
all changes would have the same efficiency
24

Which of the following organisms in the soil food chain does not obtain energy directly from plants?

A
bacteria
B
fungi
C
protozoa
D
nematodes

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