Determine the cross product of the vectors: x x y
x= 13i+4j-9k
y= -I+7j-4k

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.  

the answer would be c:   ax + b = ax + c

step-by-step explanation:

i use my brain for prombles like this maybe you could try it

step-by-step explanation: