Usman paid a one-time joiner's fee of $40 to join a swim club in addition to a weekly pool fee of $8. After a certain number of weeks, Usman had paid a total of $160. For how many weeks had he belonged to the swim club?

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.  

b. hoped i'm right lol

step-by-step explanation:

it would not be increasing by nothing that i can see probably by 25 percent that is all i can sat\y for now if i have any thing else to say i will edit this.

step-by-step explanation: