Natural Selection

The question asks about a scenario observed in honey bee populations, where the workers are infertile yet play a crucial role in protecting the queen and aiding reproduction. This scenario is an example of Kin selection.

To understand why this is the correct answer, let's explore each option:

• K selection: This refers to a life-history strategy where species are adapted to stable environments that allow them to achieve higher competitive success at a population carrying capacity. Honey bee worker behavior is not a direct example of K selection as it focuses more on population dynamics than on social structures and help behaviors.
• Sexual selection: This is a form of natural selection where certain traits increase an individual's chances of mating. It deals with how certain behaviors or features improve reproductive success through mate choice, which does not directly explain the altruistic behavior of non-reproductive honey bee workers.
• Kin selection: This concept, derived from evolutionary biology, explains altruistic behavior towards closely related individuals. The workers' actions help the queen (their close relative) successfully reproduce, thus indirectly ensuring the passage of their shared genetic material to the next generation.
• Disruptive selection: This is a process that describes changes in population genetics where extreme values for a trait are favored over intermediate values. Honey bee social structure does not fit into disruptive selection as it concerns genetic distribution rather than familial cooperation for reproductive success.

Based on this analysis, the behavior of honey bee workers protecting the queen and helping with reproduction is best explained through Kin selection. This theory suggests that individuals can pass on their genes not only via direct reproduction but also by helping relatives, who share many of their genes, to survive and reproduce.