Question 22 1 pts
Which of the following is not a true difference between the chromosomes of eukaryotes and
those of prokaryotes?
Eukaryotes usually have more than one chromosome, while prokaryotes have only one chromosome,
Eukaryotic chromosomes are linear, while those of prokaryotes are circular,
Eukaryotic chromosomes are found free in the nucleus, while those of prokaryotes are attached to the cell
membrane,
Eukaryotic chromosomes contain DNA, while prokaryotic chromosomes contain a different form of
genetic material
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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.

Which direction does the energy flow in this energy pyramid ?

The energy required to vaporize a certain amount of a substance is greater than the amount of energy necessary to raise the temperature of the same amout of that substance by 1 degreee celcius