"food web starting with sun and pointing to grasshopper and squirrel; grasshopper pointing to squirrel, wolf, and snake; squirrel pointing to wolf, snake, and bird; wolf pointing to decomposition with worms and mushrooms; snake pointing to wolf and decomposition with worms and mushrooms; bird pointing to decomposition with worms and mushrooms; decomposition pointing to the sun stating soil nutrients." which of the following best explains the flow of energy in this food web? a) mushrooms → snake → squirrel → plants b) grasshoppers → snake → wolf → hawk c) plants → squirrel → snake → mushrooms d) mushrooms → hawk → squirrel → grasshopper

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.

What enzyme is most important for dna replication and why?

Below are the three main organs that make up the plant body. what is the main function of the structure that is identified as b in the picture above? it anchors the plant.it produces food.it absorbs nutrients.it supports the plan