Which mechanism(s) are responsible for introducing new alleles into a population's gene pool? a) gene flow b) emigration c) niche shift d) natural selection

The right answer is -

A) Gene flow

Explanation:

Gene flow is a process of gene migration or the transfer of gene variant (also called allele, which is responsible for genetic variation in population) from one population to another population.

As a consequence of gene migration, new alleles are introduced or added in the already existing population, thereby increasing genetic diversity.

Thus, option A) is the right answer.

"If the water vapor content stays the same and the temperature drops, the relative humidity increases. If the water vapor content stays the same and the temperature rises, the relative humidity decreases. This is because colder air doesn't require as much moisture to become saturated as warmer air."

Explanation:

If you would like some more assistance, I would advise that you go to the website https://climate.ncsu.edu/edu/Humidity.

Have a good rest of your day!