Energy Transfer

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Energy that is not passed on from one trophic level to the next is _______.

a. lost as heat

The amount of available energy changes between the trophic levels found in a food chain or energy pyramid.
In the food chain shown, which of the following changes between trophic levels would have the highest energy conversion efficiency?

a. leaf to mouse

Which of the following statements about entropy is true?

a. Entropy increases going from one trophic level to another.

Which of the following is the most likely flow of energy in an aquatic ecosystem?

b. phytoplankton ® zooplankton ® fish ® mammal

Producers are the primary living source of energy in a food web.

True

The amount of available energy changes between the trophic levels found in a food chain or energy pyramid.
How would the amount of available energy differ in the trophic level of the mouse compared to the trophic level of the hawk?

b. Available energy would decrease from the mouse to the hawk.

Entropy is greater at higher trophic levels than at lower levels.

True

Gross production is the amount of energy left after cellular respiration.

False

How are gross production and net production different?

b. Net production is always less than gross production.

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?

b. energy is lost at each level as heat, which increases randomization

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