Cooperation and altruism Knowledge-Based Download PDF

Questions

1. 1.

   According to the ecological constraints hypothesis in animal behavior, which environmental factor primarily favors the evolution of cooperative breeding, where mature offspring delay dispersal to help raise their siblings?

   • A) An abundance of vacant nesting sites and widely dispersed food resources
   • B) A low adult survival rate combined with minimal predation pressure during dispersal
   • C) A severe shortage of suitable breeding territories and high mortality risks during dispersal
   • D) Frequent turnover of dominant breeders due to an excess of unrelated mating partners
2. 2.

   Which of the following defines inclusive fitness in behavioral ecology?

   • A) The number of surviving offspring an individual produces exclusively through its own direct reproductive efforts.
   • B) The net reproductive gain achieved strictly through mutual cooperation and reciprocal exchange with unrelated peers.
   • C) The combination of an individual's direct reproductive success and the indirect reproductive gains resulting from aiding genetic relatives.
   • D) The overall survival rate of a social group divided by the total number of cooperative actions performed within the group.
3. 3.

   Which set of behavioral and demographic criteria strictly defines eusociality in animal populations?

   • A) Group foraging strategies, linear dominance hierarchies, and seasonal cooperative courtship displays
   • B) Communal roosting, equal division of reproductive output among adult females, and migratory flocking
   • C) Cooperative care of offspring, overlapping generations within the colony, and division of labor into reproductive and non-reproductive castes
   • D) Monogamous pair-bonding, shared territory defense, and mandatory dispersal of all offspring upon reaching adulthood
4. 4.

   Which of the following conditions is essential for reciprocal altruism to be evolutionarily stable among unrelated individuals in a population?

   • A) Individuals must interact repeatedly and be able to recognize and remember cheaters.
   • B) The genetic relatedness between interacting individuals must exceed fifty percent.
   • C) The recipient must possess higher lifetime reproductive success than all other group members.
   • D) The donor must incur zero immediate physiological or survival cost when assisting another.
5. 5.

   According to Hamilton's rule regarding kin selection, under what condition does natural selection favor an altruistic act between individuals?

   • A) When the direct reproductive cost to the actor is greater than the product of the recipient's benefit and the coefficient of relatedness.
   • B) When the recipient shares no genetic relatedness with the actor, provided that the absolute fitness benefit to the group is exceptionally high.
   • C) When the behavior directly enhances the actor's own survival and future fecundity without affecting the fitness of genetic relatives.
   • D) When the reproductive benefit to the recipient, multiplied by the coefficient of relatedness, is greater than the reproductive cost incurred by the actor.