Identify the rule (or formula) that generates the nth term of a geometric sequence from the choices below. a(n) is the nth term of the geometric sequence, a represents the first term, r is the common ratio, and n is the term number.

a) a(n)=a⋅r(n−1)

b) a(n)=a−r(n−1)

c) a(n)=a+r(n−1)

d) a(n)=a⋅r(a−1)

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo

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.