試題詳解

35. Food chains tend to be short because ______
(A)most producers are inedible.
(B)local extinction of a species causes extinction of the other species in its food chain.
(C)most of the energy in a trophic level is lost as energy passes to the next higher level.
(D)only a single species of herbivore feeds on each plant species.
(E)most consumers are herbivore.