Gene flow and genetic drift both affect allele frequencies in a population. A high level of gene flow into a population genetic
diversity in a population. A high level of gene flow out of a population genetic diversity in a population. Genetic drift is the change in allele frequencies due to factors. Typically, genetic drift has the biggest impact on populations.
A high level of gene flow into a population increases genetic diversity in a population. A high level of gene flow out of a population decreases genetic diversity in a population. Genetic drift is the change in allele frequencies due to "sampling error" factors. Typically, genetic drift has the biggest impact on small populations.
Gene flow (or gene migration) is a mechanism of evolution (change the allele frequencies) which transfers genetic variation among populations due to migration. High level of gene flow decreases the genetic differentiation between the two populations.
Genetic drift is a mechanism of evolution that acts by chance (“sampling error”) often when a population is reduced in size by a natural disaster (bottleneck effect) or when a small group leaves the main population and forms a colony (founder effect).
Riparian zones are important to the natural environment because they function as natural biofilters and protect the aquatic life and the aquatic environment.
This is due to the characteristic of specificity of the enzyme. Enzymes have active sites that only bind particular substrates which they catalyze. This is because the shape of the active site is complementary to that of the substrate (like lock and key).