In seed-eating finches in the Galapagos Islands, birds with large beaks are adapted to eat seeds with hard shells, while birds with small beaks are adapted to eat seeds with soft shells.
If all the seeds in the Galapagos Islands were to develop softer shells as a result of long-term changes in the Earth's
climate, which of the following would be the MOST likely effect on the seed-eating finches?
Elimination Tool
Select one answer
A
Birds with large beaks would develop even larger beaks, while birds with small beaks would develop
even smaller beaks over many generations.
B.
Average beak size in the finches will decrease over many generations.
С
Birds with large beaks would develop smaller beaks, while birds with small beaks would develop
larger beaks over many generations.
D
No selection would operate because the finch populations on the Galapagos Islands meet all the
criteria for Hardy-Weinberg equilibrium.

Each trait of a plant is determined a. an allele b. one gene c. a pair of genes d. one dominant gene

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 organism actively hunts other