Pl
4. in an experiment, suppose that the wings of fruit flies were clipped short for fifty generations.
the fifty­first generation emerged with normal­length wings. this observation would tend to disprove the idea that evolution is based on
a.)inheritance of natural variations.
b.)inheritance of acquired characteristics.
c.)natural selection.
d.)survival of the fittest.
5. charles darwin called the ability of an organism to survive and reproduce in its specific environment.
a.)diversity.
b.)fitness.
c.)adaptation.
d.)evolution.

What does homeostasis means in biology?

If the frequency of the p allele is .63 in the population then what is the frequency of the q allele?

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.