The diagram shows four overlapping hearts. The areas of the hearts are 1 cm^2 , 4 cm^2
, 9 cm^2
and 16 cm^2
. What is the total shaded area?

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.  

step-by-step explanation: