試題詳解

49. The passage supplies information for answering which of the following questions?
(A)What varieties of plant seeds are birds that fly long distances most likely to swallow?
(B)What is a reason for accepting the long-distance dispersal of plant seeds as an explanation for the origin of Hawaiian flora?
(C)Why does successful long-distance dispersal of plant seeds require an equivalence between the ecology of the source area and that of the recipient area?
(D)Why are more varieties of plant seeds adapted to external rather than to internal bird transport?