Find the sum and express it in simplest form

(2x²+3x-4) + (x²-x-2)

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

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.