Which of the following statements about migration is true in the context of evolution and natural selection?

• A. Migration results in the immediate extinction of species.
• B. Migration can introduce new genetic variations into a population.
• C. Migration prevents any form of natural selection from occurring.
• D. Migration always leads to a decrease in genetic diversity within a population.

Answer: (B)

Verified step by step guidance

1. Understand the concept of migration in the context of evolution: Migration refers to the movement of individuals or groups from one location to another, which can lead to changes in the genetic makeup of populations.
2. Consider how migration affects genetic variation: When individuals migrate, they can bring new alleles into a population, increasing genetic diversity. This introduction of new genetic material can lead to new traits and potentially affect evolutionary processes.
3. Evaluate the statement about migration leading to extinction: Migration does not directly cause extinction. Instead, it can affect population dynamics and genetic diversity, which may influence survival and adaptation.
4. Analyze the statement about migration preventing natural selection: Migration does not prevent natural selection. Instead, it can introduce new genetic variations that natural selection can act upon, potentially leading to evolutionary changes.
5. Assess the statement about migration decreasing genetic diversity: Migration typically increases genetic diversity by introducing new alleles into a population, rather than decreasing it.