試題詳解

49. Which of the following statements about energy flow is incorrect? 
(A) Only net primary productivity is available to consumers.
(B) Only about one-thousandth of the chemical energy fixed by photosynthesis reaches a tertiary-level consumer.
(C) Secondary productivity declines with each trophic level.
(D) About 90% of the energy at one trophic level does not appear at the next.
(E) Eating meat is probably the most economical way of acquiring the energy of photosynthetic productivity.