Analyze Examples of Cooperative Behavior - Biology

1. Which term best fits: an individual helps a sibling raise offspring instead of breeding?

   Kin selection. Helper prioritizes relative's reproduction due to shared genes.

2. What is indirect reciprocity?

   Help given based on reputation; helper gains future help from others. Helpers gain reputation and receive future help from third parties.

3. Identify the interaction: a remora rides a shark and eats scraps; the shark is unaffected.

   Commensalism (not cooperation). Remora benefits but shark gains no advantage from the relationship.

4. What is a cooperative breeding system?

   Nonbreeders help raise offspring of breeders in a group. Helper individuals increase group reproductive success without breeding.

5. What is food sharing as cooperative behavior?

   An individual provides food to another, increasing recipient survival. Donor sacrifices resources to improve another's nutritional status.

6. What is direct reciprocity?

   Help given to an individual who later helps the same helper. The same individual who was helped later returns the favor.

7. Identify the problem: one bacterium uses shared enzymes but does not secrete any itself.

   Cheating (free-riding). Individual exploits group resources without contributing to production.

8. Identify the behavior: a ground squirrel calls when a hawk appears, attracting attention.

   Alarm calling (altruistic cooperation). Caller risks predator attention to warn others of danger.

9. What is policing in social insects?

   Workers suppress or remove eggs laid by other workers. Workers prevent cheating by enforcing reproductive division of labor.

10. What is kin selection?

    Selection favoring help to relatives due to shared genes. Relatives share genes, so helping them can spread altruistic traits.

11. What is altruism in animal behavior?

    A behavior that benefits others at a cost to the actor. The actor sacrifices personal fitness to help others.

12. What is a classic mutualism involving reef-building corals?

    Corals and zooxanthellae algae exchange shelter for sugars. Algae photosynthesize inside coral tissue, providing mutual benefits.

13. What is cooperative hunting?

    Individuals coordinate to capture prey more effectively than alone. Group hunting increases success rate over solitary attempts.

14. What is an alarm call as cooperative behavior?

    A warning signal that reduces predation risk for others. Caller risks exposure but protects group members from predators.

15. What is a classic mutualism involving flowering plants and insects?

    Pollination: insects get nectar; plants get pollen transfer. Both partners trade food resources for reproductive services.

16. What is sentinel behavior?

    One individual watches for danger while others forage. Guards sacrifice feeding time to protect group from threats.

17. In Hamilton's rule, what does $C$ represent?

    Fitness cost to the actor. The reproductive sacrifice made by the helping individual.

18. Which option satisfies Hamilton's rule: $r=0.5$, $B=6$, $C=2$?

    Yes; $rB=3$ and $3>2$. Hamilton's rule is satisfied: $0.5 \times 6 = 3 > 2$.

19. What is the cooperative benefit of schooling in fish?

    Reduced individual predation risk and improved predator detection. Group living provides safety in numbers against predators.

20. What is a common example of eusocial cooperative behavior?

    Worker bees helping the queen raise larvae. Workers sacrifice reproduction to enhance colony productivity.

21. What is the prisoner's dilemma used to model in biology?

    The tension between cooperation benefits and incentives to defect. Models conflict between mutual benefit and individual advantage.

22. Identify the behavior: worker ants forgo reproduction and feed larvae in the colony.

    Eusocial cooperative brood care. Workers sacrifice reproduction to raise colony offspring collectively.

23. What is symbiosis as a broad term related to cooperation?

    A close, long-term interaction between different species. Long-term relationships between species can involve cooperation.

24. What is the key feature that distinguishes cooperation from coincidence?

    A partner's action increases another individual's fitness. The action must actively improve another's survival or reproduction.

25. In Hamilton's rule, what does $B$ represent?

    Fitness benefit to the recipient. The reproductive advantage gained by the individual being helped.

26. Which term best fits: individuals help those known to have helped others previously?

    Indirect reciprocity. Reputation-based helping where good deeds are publicly rewarded.

27. What is a classic mutualism involving plants and fungi?

    Mycorrhizae: fungi aid mineral uptake; plants provide sugars. Both partners exchange resources essential for growth.

28. What is the main ecological condition that often favors cooperation?

    High costs of solitary living or strong predation pressure. Environmental pressures make cooperation essential for survival.

29. What is the cooperative benefit of pack living in wolves?

    More effective hunting and defense of territory. Group coordination enables successful hunting of large prey.

30. What is tit-for-tat as a cooperation strategy?

    Start cooperative, then copy the partner's previous action. Reciprocal strategy that rewards cooperation and punishes defection.

31. What is the cooperative benefit of flocking in birds?

    Improved vigilance and reduced per-capita predation risk. Flocking increases predator detection and confuses attackers.

32. What is a public good in cooperation biology?

    A shared resource produced by individuals that benefits group members. Resources produced cooperatively benefit all group participants.

33. Identify the interaction: a tapeworm gains nutrients and the host loses resources.

    Parasitism (not cooperation). Tapeworm benefits while harming the host's health and resources.

34. What does inclusive fitness mean?

    Direct fitness plus fitness gained by helping relatives reproduce. Combines personal reproduction with benefits from helping relatives.

35. What is eusociality?

    Reproductive division of labor with cooperative brood care and overlap. Complex social system with specialized workers and overlapping generations.

36. What is reciprocal altruism?

    Helping that is favored when help is later returned. Cooperation persists because helpers eventually receive help back.

37. In Hamilton's rule, what does $r$ represent?

    Coefficient of relatedness between actor and recipient. Measures genetic similarity between helper and helped individual.

38. What is parasitism (not cooperation) in terms of fitness outcomes?

    One benefits while the other is harmed. One partner gains at the expense of the other's fitness.

39. What is group selection in the context of cooperation?

    Selection favoring traits that benefit group success over individuals. Groups with more cooperators outcompete less cooperative groups.

40. Identify the interaction: bacteria secrete enzymes that digest food for the whole biofilm.

    Public-good cooperation. Enzymes benefit all community members as shared resources.

41. What is cooperative behavior in biology?

    Behavior in which individuals work together to increase fitness. This defines cooperation as coordinated actions that enhance reproductive success.

42. What is Hamilton's rule for when altruism can evolve?

    $rB > C$. Altruism evolves when relatedness times benefit exceeds cost.

43. Which term best fits: a vampire bat shares blood with a bat that later shares back?

    Reciprocal altruism (direct reciprocity). Direct exchange of help between the same two individuals.

44. What is a classic mutualism involving legumes and bacteria?

    Rhizobia fix nitrogen; legumes provide carbohydrates and habitat. Bacteria provide essential nutrients in exchange for housing.

45. What is cooperative defense?

    Group members coordinate to deter predators or rivals. Collective defense is more effective than individual protection.

46. Identify the interaction: two clownfish share an anemone shelter and both gain protection.

    Mutualism (cooperation). Both fish benefit from shared shelter protection.

47. What is mutualism as a type of cooperative interaction?

    Both species benefit from the interaction. Both partners gain reproductive advantages from the interaction.

48. Identify the interaction: a bird eats ticks off a large mammal; both gain a benefit.

    Mutualism (cooperation). Bird removes parasites while gaining food from the mammal.

49. What is grooming as cooperative behavior in many mammals?

    Mutual cleaning that reduces parasites and strengthens social bonds. Partners remove parasites and maintain social relationships.

50. Identify the behavior: meerkats take turns watching for predators while others feed.

    Sentinel behavior (cooperation). Guards sacrifice feeding time to protect foraging group members.

51. Identify the behavior: lions coordinate positions to surround prey during a hunt.

    Cooperative hunting. Group coordination increases hunting success through strategic positioning.

52. What is a cheater in a cooperative system?

    An individual that gains benefits without paying cooperation costs. Free-riders exploit cooperation without contributing to the system.

Study these flashcards