Urn 1 contains 4 white and 3 black marbles and urn 2 contains 8 white and 10 black. two marbles are randomly selected form urn 1 and placed into urn 2. if 3 marbles are then randomly selected from urn 2, what is the expected number of white marbles drawn?

what?

step-by-step explanation:

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.  

i think the answer is c sorry if it's wrong