What is the maximum number of relative extrema contained in the graph of this function?

The maximum number of relative (local) extrema is 3.

Explanation: the polynomial is of 4th degree. Its derivative is a polynomial of a 3rd degree, which may have up to 3 roots (tied to extrema of the original polynomial). If all 3 roots are real each with multiplicity of 1, then the original polynomial will show 3 relative extrema.

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.