If Brianna's test total is 84 out of 100, her homework score is 91 out of 100, and her in-class grade Is 75 out of 100, what is her grade average

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.  

19

step-by-step explanation:

here the answers ur welcome also plz mark as brainliest if someone else anwers