Final answer:
Xenophobia in mole rats from different environments promotes genetic diversity within a population.
Step-by-step explanation:
Xenophobia in mole rats from different environments promotes genetic diversity within a population. This is because individuals from different environments bring in unique alleles, resulting in offspring with diverse phenotypes. Genetic diversity enhances the survival of a population in a changing environment as it increases the chances of some individuals having adaptive traits. For example, when new individuals immigrate into a population, they may introduce new alleles through genetic drift, which can increase the genetic diversity. Similarly, when two groups of mole rats from isolated regions with suitable habitats come into contact, the exchange of genes enhances the genetic diversity. Xenophobia in mole rats does not necessarily reduce competition for resources, enhance social cohesion, or prevent the spread of diseases. Instead, it primarily promotes genetic diversity.