Answer:
True. Kin selection is the primary explanation for the evolution of blood-sharing behavior in vampire bats. Vampire bats are known to share blood with their close relatives, and this behavior is believed to have evolved as a means of promoting the survival and reproductive success of kin. By sharing blood, vampire bats are able to help their relatives survive when food is scarce, and this increases the likelihood that their genes will be passed on to future generations.
Step-by-step explanation:
Kin selection is a theory in evolutionary biology that explains how behaviors that benefit one's relatives can evolve even if they are costly to the individual. According to this theory, organisms are more likely to behave altruistically towards close relatives because they share a greater proportion of their genes than they do with more distant relatives or unrelated individuals.
In the case of vampire bats, blood sharing behavior has been shown to be primarily directed towards close kin, such as offspring and siblings. This behavior is believed to have evolved because it enhances the survival and reproductive success of the bat's relatives, who are more likely to carry the same genes. By helping their kin survive when food is scarce, the bats increase the likelihood that their genes will be passed on to future generations, including those of the individuals sharing the blood.
This behavior is also influenced by the high costs of not sharing blood, as bats that go too long without feeding are at risk of starvation, which can lead to death. By sharing blood with their kin, vampire bats can ensure that they and their relatives survive until they are able to find more food.
Overall, the kin selection theory provides a strong explanation for the evolution of blood sharing behavior in vampire bats, as it predicts that organisms will act altruistically towards close kin to promote the survival and reproductive success of their genes.