What is 1+9-8+40-7-8+100-20

107

I did the math on my calculator, just put it in the calculator, like it is, it follows PEMDAS, the way its written.

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.