3+12=−−(+13) what is the answer

False.

Step-by-step explanation:

We can remove the --+ and make it +.

3 + 12 = 13

15 = 13.

This is false.

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.