If David and jake each looked at a strand of their hair under a microscope measured the diameter jake strand was 0.005 cm in the diameter David strand was 0.0012 cm in diameter

Step-by-step explanation:

To find the ratio between these diameters, we just need to divide them

and

If we divide

Therefore, Jake's strand represents 4 times David's strand.

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.  

just get this app called photo math it should be able to do those