Order the following rational numbers from least to greatest: 3.45, -1/2, 0.9.* 3.45, -1/2, 0.9
3.45, 0.9,-1/2
-1/2, 3.45, 0.9
-1/2, 0.9,3.45

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.