There are four students in each small reading group there are 24 students in all.
how many reading groups are there

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.  

3/20

step-by-step explanation:

well, there are 20 outcomes, and 3 of them you want. so, 3/20