26. Three quarters of the students running a 100-yard race finished with an average time of 16 seconds. The remaining 25% of students finished with an average time of 12 seconds. What was the
average time overall?
a. 13 seconds
b. 14 seconds
c. 15 seconds
D16 seconds
e. 17 seconds

55/i dont know i do it for the points

step-by-step explanation:

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step-by-step explanation:

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.