Martin can run 1 mile in 7 minutes. What valid proportions can be written from this information? Check all that apply. StartFraction 1 over 7 EndFraction = StartFraction 3 over 21 EndFraction StartFraction 1 over 21 EndFraction = StartFraction 3 over 7 EndFraction StartFraction 7 over 1 EndFraction = StartFraction 3 over 21 EndFraction StartFraction 7 over 1 EndFraction = StartFraction 21 over 3 EndFraction StartFraction 1 over 7 EndFraction = StartFraction 21 over 3 EndFraction

1/7=3/21

7/1=21/3

the other fractions are not correct/valid therefore the fractions above are the correct answers

Step-by-step explanation:

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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.  

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.