Answer these asap!
1. how do modern goldfish look different from their prussian carp ancestors?
2. what types of variation might exist within a population of flowering plants?
3. how did seed availability affect traits of individuals in the medium ground finch population of the galapagos island?
4. how can variation of traits in a population in the adaption of the population to its environment?
5. excess salt in the body can damage cells and organs. marine iguanas, which live on the beaches of the galapagos island, eat mostly seaweed. they have ducts that remove excess salt from their bodies. how are the salt ducts an adaptation to the iguanas' environment?

Which of the following shows the correct order in which light information travels through the eye? (2 points) lens, pupil, retina, optic nerve pupil, lens, retina, optic nerve pupil, lens, optic nerve, retina lens, pupil, optic nerve, retina

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.

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist