How many degrees are there in each exterior angle of an equilateral triangle? a. 60° b. 120° c. 90° d. 30°

B. 120 degrees

That is because since we know that the inside angles of a equilateral triangle is 60 degrees and a line is 180 degrees do this:

180 - 60 = 120 degrees

he spend 5.1 minutes chatting with his friends.

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5.1

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.