18. Refer to Model 2. Study the bone arrangement in the bird and whale. Propose an explanation for the similarity of elongated bone arrangement in the lower parts of the forelimb (metacarpals and
phalanges), given the differences in the animals?

Adaptive radiations can be a direct consequence of four of the following five factors. selectthe exception. a) vacant ecological niches b) genetic drift c) colonization of an isolated region that contains suitable habitat and few competitor species d) evolutionary innovation e) an adaptive radiation in a group of organisms (such as plants) that another group uses as food