Wor At an assembly, 180 students sit in 9 equal rows. How many student n each row?

20

Step-by-step explanation:

Divide the number of students by the number of rows,

180/9=20

linear pair postulates

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.