2. The Tour de France bicycle race is not only challenging; at 2,300 miles, it is long! In kilometers, about how long is the race?

Around 3701 kilometers

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.  

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)