Can some one help me on these last two questions? please?

For mendels studies, why was it important that his subjects, pea plants, could reproduce quickly and and produce many offspring?

Which methods are the most common for dealing with waste

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