Answer: The impact of the Great Depression on the rich and poor
Explanation: A cohort is a group of individuals who experienced or share a common event in a specific time period. The cohort effect is used to describe various characteristics of an area of study such as the incidence of a characteristic over time among subjects who are defined by some shared life experience such as the Great Depression.
The Great Depression may have affected the poor and the rich differently but the events leading up to, during and the aftermath is an experience that was shared by both the rich and poor and this shared experience may influence the entire group's opinions and decisions for several years.
Answer:
Directional selection
Explanation:
Directional selection is a mode of natural selection in which <u>a phenotype is favoured among other phenotypes </u>and therefore the population with the phenotype favoured increases over time to optimize their chances of survival.
This selection usually <u>requires a force in nature that causes a population to evolve towards one end of a trait spectrum.</u>
In this example, dark-colored moths are selected by predators because they stand out to predators against the light-colored foliage. Therefore, <u>this force in nature causes moths to change their phenotype and it shifts away from the dark-colored phenotype in order to increase their chances of survival so that predators do not predate them as easily because they won't stand out against the light-colored foliage. </u>
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Thus this is an example of directional selection.
Liberty and justice for all
