The grid you see below is in the shape of a rectangle. What is the area, in square units, of the shaded part?

It's 15

Area of the full shape is:

It's a rectangle so: 10 × 3 = 30 (area)

The part is half the rectangle so: 30 ÷ 2 = 15

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

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.