A group of scientists monitored the population of gypsy moths and the rate of defoliation in one US region over a four-
year period. Their collected data appears in the chart. Study the data, and then answer the following questions.
Acres of land with Defoliation
55,100
Year 1
Year 2
Year 3
Year 4
Population of Moths
3.845
5.780
15,804
52, 350
125,460
325,455
741,355
Part A
Calculate the percent increase in population between year 1 and year 2, year 2 and year 3, and year 3 and year 4. Round
up or down to the nearest whole percentage. Show your work.

To answer this question, researchers studied populations of the dusky salamander (desmognathus ochrophaeus) living on different mountain ranges in the southern appalachian mountains. the researchers tested the reproductive isolation of pairs of salamander populations by leaving one male and one female together and later checking the females for the presence of sperm. four mating combinations were tested for each pair of populations (a and b)—two within the same population (female a with male a and female b with male b) and two between populations (female a with male b and female b with male a). the proportion of successful matings for each mating combination was measured. for example, when all the matings of a particular combination were successful, the researchers gave it a value of 1; when none of the matings were successful, they gave it a value of 0. then the researchers calculated an index of reproductive isolation that ranged from 0 (no isolation) to 2 (full isolation). the reproductive isolation value for two populations is the sum of the proportion of successful matings of each type within populations (aa + bb) minus the sum of the proportion of successful matings of each type between populations (ab + ba). the table provides data for the geographic distances and reproductive isolation values for 27 pairs of dusky salamander populations.

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