If the average grade of an English class rose from 70 to 85, what is the approximate percent increase?
The percent increase is approximately 14%.
The percent increase is approximately 17%.
The percent increase is approximately 2196.
The percent increase is approximately 35%.

The correct answer is actually around 21%. Are you sure the question wasn't asking what the approximate percent decrease from 85 to 70 was? Because in that case it would be around 17%.

Step-by-step explanation:

2

step-by-2step 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.