Question

Which of the following accurately describes the flow of energy through ecosystems?
a. All of the energy found within a primary producer is transferred to a first-level consumer.
b. A third-level consumer would store a greater portion of energy from the previous level than would a second-level consumer.
c. Energy is always passed from the consumer to the primary producer.
d. The percentage of the original energy from producers that's available to the consumer is quite small.

Answer 1

d. The percentage of the original energy from producers that's available to the consumer is quite small.

The 10% energy rule.
This energy rule states that every energy that is transferred from one organism to the other decreases by 10%. For example, a plant has created food thru photosynthesis gained 1000J and a cow eats it it would receive an energy of 100J and a human eats the cow would receive 10J.

Answer 2

the answer is D. the percentage of the original energy from producers that's available to the consumer is quite small.