In population genetics, directional selection is a mode of natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype
<span>The most obvious change due to seasonal variation is the change from summer to winter. Some animals migrate to other parts of the world, such as migratory birds. Many animals in colder climates hibernate. In both cases, the absence of these animals leads to a gap in the ecosystem. In regions with highly seasonal rainfall, the low rainfall season can lead to low flows in rivers, and a reduction of certain habitats for some aquatic organisms, such as beaver or aquatic insects.</span>
Answer:
Chloroplasts use photosynthesis to get energy from the sun and transform it into “food” for the cell. It also gives the plant cell its green color.
Explanation:
An example of refraction<span> is when </span>waves<span> approach a straight shoreline at an angle. The part of the </span>wave<span> crest closer to shore is in shallower water and moving slower than the part away from the shore in deeper water. The </span>wave<span> crest in deeper water catches up so that the </span>wave<span> crest tends to become parallel to the shore.</span>
