試題詳解

3. Physiological ecologists study
(A) nutrient cycling and energy flow through ecosystems.
(B) exchanges of materials, energy, and organisms between communities.
(C) physiological and anatomical mechanisms by which organisms deal with variation in their hysical and chemical environment.
(D) physiological and anatomical mechanisms by which organisms deal with variation in their social environment.
(E) None of the choices are correct.