Prove that the value of the following expressions does not depend on the value of the variable:5x^2-(2x+1).(x-2)-x(3x+3)+ 7

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.  

step-by-step explanation:

answer is  

a.

p = 78

step-by-step explanation: