Question 1

When energy flows from one trophic level to another,only a small amount is actually used.Which of the following uses of energy by an organism allows for the least amount of transfer to a different trophic level?
A) cellular respiration
B) growth
C) death
D) excretion
E) reproduction

Accepted Answer

The energy used by an organism for cellular respiration is not available for a different trophic level because it is lost to the environment as heat. The energy used for growth and reproduction becomes available for another trophic level because the organisms can be consumed by predators. The energy used for excretion and associated with the death of the organism becomes available to the decomposers within the community.

Question 2

When a rabbit eats a bean plant,a portion of the available energy moves into the rabbit's body.When the rabbit is eaten by a hawk,a portion of the available energy moves into the hawk's body.Indicate the various areas that energy is used by an organism,and why only 10% of the rabbit's available energy will move to the hawk.

Accepted Answer

The answer of When a rabbit eats a bean plant,a...

Quiz 24: Ecology and the Nature of Ecosystems

When energy flows from one trophic level to another,only a small amount is actually used.Which of the following uses of energy by an organism allows for the least amount of transfer to a different trophic level?