Can someone please answer these 2 questions for me ? 1. How many O elements(s) is (are) there in water?

2. How do you know the number of H and O elements in water?

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