[单选题]
Which of the followi
hjulzx,w,j(( 8mu+y yy.z z3 ud(u qq(ng diagrams shows the flow of ener
g: dud3j5 sls-cg-eg75i*eb ogy in an ecosystem having four trophic levels? The size of each level represents
cs lde: s d7-j*bg-3g5o5giu e energy values (in $kJm^{−2}yr^{−1}$) in the energy pyramids below.
A.
B.
C.
D.
参考答案:
C
本题详细解析:
Explanation:
Most of the energy present in each trophic level does not pass to the next level in large part because of respiration. Producers usually have the largest amount of biomass and greatest amount of energy and form the base of the stepped pyramid. Typically only 10% of the energy is moved from one trophic level to the next which is why the upper levels are generally smaller than lower levels.
