Biology Flashcards: Evaluate Evidence For Social Behavior Advantages

What this deck covers

This deck focuses on Evaluate Evidence For Social Behavior Advantages, giving you a quick way to review the definitions, rules, and examples that matter most for Biology.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: Which option indicates kin selection rather than reciprocity: helping siblings or helping unrelated strangers once?

Answer: Helping siblings. Helping relatives indicates selection based on genetic relatedness.

Flashcard 2: Identify the best conclusion if group-living animals have higher survival only when predators are present.

Answer: Anti-predator benefits are context-dependent and drive social advantage. Context-dependency shows specific conditions where sociality provides benefits.

Flashcard 3: Which option indicates kin selection rather than reciprocity: helping siblings or helping unrelated strangers once?

Answer: Helping siblings. Helping relatives indicates selection based on genetic relatedness.

Flashcard 4: Identify the best evidence for cooperative hunting advantage: higher capture success in groups or louder calls.

Answer: Higher capture success in groups. Higher success rates demonstrate cooperative hunting effectiveness.

Flashcard 5: What is a disease-related cost that can reduce advantages of group living?

Answer: Higher pathogen transmission due to close contact and density. Close contact in groups facilitates disease spread between individuals.

Flashcard 6: Which option is strongest evidence of information sharing: naïve individuals find food faster after joining groups?

Answer: Naïve individuals find food faster after joining groups. Improved foraging success demonstrates information transfer within groups.

Flashcard 7: Which option best supports dilution effect: constant attack rate or higher attack rate per individual?

Answer: Constant attack rate (per group) with lower risk per individual. Fixed attack rate with more individuals reduces per-capita risk.

Flashcard 8: Which statement best supports a causal benefit of sociality: random assignment to groups or self-selected groups?

Answer: Random assignment to groups. Random assignment eliminates selection bias and confounding variables.

Flashcard 9: What is eusociality?

Answer: Reproductive division of labor, cooperative brood care, overlapping generations. Highly organized societies with specialized reproductive roles.

Flashcard 10: Which conclusion is supported if individuals in larger groups spend less time scanning and more feeding?

Answer: Group vigilance reduces individual vigilance costs, improving foraging time. Shared vigilance allows individuals to allocate more time to feeding.

Flashcard 11: What is meant by fitness in evolutionary biology when evaluating social behavior?

Answer: Reproductive success, often measured by surviving offspring produced. Fitness measures evolutionary success through reproductive output.

Flashcard 12: Identify the correct conclusion if group living increases survival but decreases births per adult.

Answer: Net advantage depends on overall lifetime reproductive success. Total lifetime reproductive success determines evolutionary advantage.

Flashcard 13: Identify the correct interpretation if helpers increase fledgling survival but do not reproduce that season.

Answer: Helping can increase inclusive fitness if beneficiaries are relatives. Helpers gain inclusive fitness through relatives' reproductive success.

Flashcard 14: Identify the correct claim if group size increases and per-capita food decreases while survival stays constant.

Answer: Competition costs rise; net advantage is uncertain without reproduction data. Increased competition may offset other benefits of group living.

Flashcard 15: What is the confusion effect in predator–prey interactions?

Answer: Predators have more difficulty targeting one individual in a group. Groups make it harder for predators to focus on one target.

Flashcard 16: What is mutualism in the context of social behavior?

Answer: A social interaction that increases fitness of all participating individuals. All participants benefit, making cooperation stable and advantageous.

Flashcard 17: Identify the correct interpretation if helpers increase fledgling survival but do not reproduce that season.

Answer: Helping can increase inclusive fitness if beneficiaries are relatives. Helpers gain inclusive fitness through relatives' reproductive success.

Flashcard 18: What is mutualism in the context of social behavior?

Answer: A social interaction that increases fitness of all participating individuals. All participants benefit, making cooperation stable and advantageous.

Flashcard 19: Which option is the best fitness measure when evaluating social behavior advantages?

Answer: Number of surviving offspring that later reproduce. Reproductive success is the ultimate measure of evolutionary fitness.

Flashcard 20: Which type of selection explains altruism toward close relatives?

Answer: Kin selection. Relatives share genes, making helping them evolutionarily beneficial.

Flashcard 21: In Hamilton's rule $rB > C$, what does $C$ represent?

Answer: Fitness cost to the individual performing the act. Lower costs make altruistic behaviors more likely to be selected.

Flashcard 22: What is altruism in evolutionary terms?

Answer: A behavior that benefits another individual while costing the actor fitness. Actor pays a cost while recipient gains a benefit.

Flashcard 23: What is the key criterion for calling a behavior cooperative rather than merely social?

Answer: It increases another individual's fitness or survival probability. Cooperation specifically requires helping others, not just social interaction.

Flashcard 24: What is a thermoregulation advantage of social behavior in cold environments?

Answer: Huddling reduces heat loss and lowers energy expenditure. Shared body heat reduces individual energy costs in cold conditions.

Flashcard 25: What is reciprocal altruism?

Answer: Helping that is favored when help is later returned by the recipient. Future reciprocation makes current help evolutionarily beneficial.

Flashcard 26: In Hamilton's rule $rB > C$, what does $r$ represent?

Answer: Coefficient of relatedness between actor and recipient. Higher relatedness makes altruism more likely to evolve.

Flashcard 27: What is meant by cost–benefit analysis of a social behavior?

Answer: Comparing fitness costs to fitness benefits to predict selection outcomes. Determines whether natural selection favors or opposes the behavior.

Flashcard 28: What is cooperative breeding?

Answer: Nonbreeders help raise offspring, increasing offspring survival. Helpers assist parents, improving offspring survival and success.

Flashcard 29: Which type of selection explains altruism toward close relatives?

Answer: Kin selection. Relatives share genes, making helping them evolutionarily beneficial.

Flashcard 30: What is a key condition required for reciprocal altruism to be favored by selection?

Answer: Repeated interactions with ability to recognize and punish cheaters. Recognition and punishment prevent exploitation of helpful individuals.

Flashcard 31: What is the dilution effect in animal groups?

Answer: Individual chance of being attacked decreases as group size increases. Larger groups spread predation risk across more individuals.

Flashcard 32: What is the dilution effect in animal groups?

Answer: Individual chance of being attacked decreases as group size increases. Larger groups spread predation risk across more individuals.

Flashcard 33: What is the many-eyes hypothesis for group living?

Answer: More individuals detect predators sooner, increasing group survival. More group members means faster predator detection overall.

Flashcard 34: What is a common line of evidence that social behavior is advantageous?

Answer: Higher survival or reproductive output in social versus solitary individuals. Compares fitness outcomes between social and solitary strategies.

Flashcard 35: What is a common foraging-related advantage of social behavior?

Answer: Increased food-finding efficiency via information sharing. Group members share information about food locations.

Flashcard 36: In Hamilton's rule $rB > C$, what does $B$ represent?

Answer: Fitness benefit to the recipient of the altruistic act. Greater benefits make altruistic acts more evolutionarily favorable.

Flashcard 37: Identify the best conclusion if group-living animals have higher survival only when predators are present.

Answer: Anti-predator benefits are context-dependent and drive social advantage. Context-dependency shows specific conditions where sociality provides benefits.

Flashcard 38: Which option indicates reciprocal altruism: repeated help between nonrelatives or one-time help to offspring?

Answer: Repeated help between nonrelatives. Repeated exchange between non-relatives indicates reciprocal cooperation.

Flashcard 39: Which study design most strongly supports a causal advantage of social behavior?

Answer: Controlled experiment manipulating group size or social access. Experiments control variables to establish causal relationships.

Flashcard 40: What is a confounding variable in studies of social behavior advantages?

Answer: A third factor correlated with group living and the measured outcome. Confounds can create false correlations between sociality and outcomes.

Flashcard 41: Identify the most likely cost if larger groups show higher parasite loads but similar food intake.

Answer: Increased disease transmission is a cost of group living. Higher parasite loads indicate disease transmission costs of grouping.

Flashcard 42: What is a common foraging-related advantage of social behavior?

Answer: Increased food-finding efficiency via information sharing. Group members share information about food locations.

Flashcard 43: What is a key limitation of purely observational evidence for social benefits?

Answer: Correlation does not demonstrate that sociality causes the benefit. Correlation alone cannot establish that sociality causes the benefit.

Flashcard 44: In Hamilton's rule $rB > C$, what does $B$ represent?

Answer: Fitness benefit to the recipient of the altruistic act. Greater benefits make altruistic acts more evolutionarily favorable.

Flashcard 45: Identify the confound if healthier individuals both join groups and survive longer.

Answer: Preexisting health status confounds the sociality–survival relationship. Health status affects both group joining and survival outcomes.

Flashcard 46: What is inclusive fitness?

Answer: Direct fitness plus fitness gained by helping genetic relatives reproduce. Includes both personal reproduction and benefits from helping relatives.

Flashcard 47: In Hamilton's rule $rB > C$, what does $r$ represent?

Answer: Coefficient of relatedness between actor and recipient. Higher relatedness makes altruism more likely to evolve.

Flashcard 48: Which option best indicates mutualism rather than altruism: both individuals gain or one gains at a cost?

Answer: Both individuals gain. Mutual benefit distinguishes mutualism from one-sided altruism.

Flashcard 49: What is dominance hierarchy?

Answer: Ranked social order that influences access to resources and mates. Social rank determines priority access to valuable resources.

Flashcard 50: Which option best supports thermoregulation advantage: lower metabolic rate in huddles or higher parasite rate?

Answer: Lower metabolic rate in huddles. Lower metabolic rates demonstrate energy savings from group thermoregulation.

Flashcard 51: What is a key limitation of purely observational evidence for social benefits?

Answer: Correlation does not demonstrate that sociality causes the benefit. Correlation alone cannot establish that sociality causes the benefit.

Flashcard 52: What is the definition of social behavior in biology?

Answer: Behavior involving interactions among individuals of the same species. Focuses on interactions within a species rather than between species.

Flashcard 53: What is a key condition required for reciprocal altruism to be favored by selection?

Answer: Repeated interactions with ability to recognize and punish cheaters. Recognition and punishment prevent exploitation of helpful individuals.

Flashcard 54: What is a direct advantage of group living related to predation risk?

Answer: Reduced individual predation risk through dilution and vigilance. Group membership decreases individual risk of predator attacks.

Flashcard 55: Which option best supports thermoregulation advantage: lower metabolic rate in huddles or higher parasite rate?

Answer: Lower metabolic rate in huddles. Lower metabolic rates demonstrate energy savings from group thermoregulation.

Flashcard 56: What is cooperative breeding?

Answer: Nonbreeders help raise offspring, increasing offspring survival. Helpers assist parents, improving offspring survival and success.

Flashcard 57: What is an ultimate explanation for social behavior?

Answer: Evolutionary function explaining how behavior increases fitness. Focuses on why the behavior evolved and its fitness benefits.

Flashcard 58: What is meant by cost–benefit analysis of a social behavior?

Answer: Comparing fitness costs to fitness benefits to predict selection outcomes. Determines whether natural selection favors or opposes the behavior.

Flashcard 59: Identify whether $rB > C$ is satisfied if $r=0.5$, $B=10$, and $C=4$.

Answer: Yes, because $0.5\times 10 = 5$ and $5 > 4$. $0.5 \times 10 = 5$, and $5 > 4$ satisfies Hamilton's rule.

Flashcard 60: What is a proximate explanation for social behavior?

Answer: Immediate mechanisms such as hormones, neural circuits, and development. Focuses on how behavior works mechanistically in the individual.

Flashcard 61: What is intraspecific competition?

Answer: Competition among individuals of the same species for limited resources. Same-species competition occurs when resources are limited.

Flashcard 62: What is dominance hierarchy?

Answer: Ranked social order that influences access to resources and mates. Social rank determines priority access to valuable resources.

Flashcard 63: What is cooperative hunting?

Answer: Group hunting that increases capture success or allows larger prey capture. Multiple hunters increase success rate or enable larger prey capture.

Flashcard 64: What is a competition-related cost of social behavior?

Answer: Increased competition for food, mates, or nesting sites. Group members compete for the same limited resources.

Flashcard 65: What is a proximate explanation for social behavior?

Answer: Immediate mechanisms such as hormones, neural circuits, and development. Focuses on how behavior works mechanistically in the individual.

Flashcard 66: What is a confounding variable in studies of social behavior advantages?

Answer: A third factor correlated with group living and the measured outcome. Confounds can create false correlations between sociality and outcomes.

Flashcard 67: What is altruism in evolutionary terms?

Answer: A behavior that benefits another individual while costing the actor fitness. Actor pays a cost while recipient gains a benefit.

Flashcard 68: What does Hamilton's rule state for when altruism can evolve?

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

Flashcard 69: Which conclusion is supported if individuals in larger groups spend less time scanning and more feeding?

Answer: Group vigilance reduces individual vigilance costs, improving foraging time. Shared vigilance allows individuals to allocate more time to feeding.

Flashcard 70: What is the key criterion for calling a behavior cooperative rather than merely social?

Answer: It increases another individual's fitness or survival probability. Cooperation specifically requires helping others, not just social interaction.

Flashcard 71: What is inclusive fitness?

Answer: Direct fitness plus fitness gained by helping genetic relatives reproduce. Includes both personal reproduction and benefits from helping relatives.

Flashcard 72: What is alloparenting?

Answer: Care of offspring by individuals other than the genetic parents. Non-parents provide care, benefiting offspring and sometimes themselves.

Flashcard 73: What is a common line of evidence that social behavior is advantageous?

Answer: Higher survival or reproductive output in social versus solitary individuals. Compares fitness outcomes between social and solitary strategies.

Flashcard 74: What is a competition-related cost of social behavior?

Answer: Increased competition for food, mates, or nesting sites. Group members compete for the same limited resources.

Flashcard 75: What does Hamilton's rule state for when altruism can evolve?

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

Flashcard 76: What is a thermoregulation advantage of social behavior in cold environments?

Answer: Huddling reduces heat loss and lowers energy expenditure. Shared body heat reduces individual energy costs in cold conditions.

Flashcard 77: What is the many-eyes hypothesis for group living?

Answer: More individuals detect predators sooner, increasing group survival. More group members means faster predator detection overall.

Flashcard 78: Which option best indicates mutualism rather than altruism: both individuals gain or one gains at a cost?

Answer: Both individuals gain. Mutual benefit distinguishes mutualism from one-sided altruism.

Flashcard 79: What is the definition of social behavior in biology?

Answer: Behavior involving interactions among individuals of the same species. Focuses on interactions within a species rather than between species.

Flashcard 80: What is meant by fitness in evolutionary biology when evaluating social behavior?

Answer: Reproductive success, often measured by surviving offspring produced. Fitness measures evolutionary success through reproductive output.

Flashcard 81: In Hamilton's rule $rB > C$, what does $C$ represent?

Answer: Fitness cost to the individual performing the act. Lower costs make altruistic behaviors more likely to be selected.

Flashcard 82: Which option is the best fitness measure when evaluating social behavior advantages?

Answer: Number of surviving offspring that later reproduce. Reproductive success is the ultimate measure of evolutionary fitness.

Flashcard 83: Which option best supports the many-eyes hypothesis: earlier predator detection or faster growth?

Answer: Earlier predator detection. Earlier detection directly supports the many-eyes vigilance hypothesis.

Flashcard 84: What is a disease-related cost that can reduce advantages of group living?

Answer: Higher pathogen transmission due to close contact and density. Close contact in groups facilitates disease spread between individuals.

Flashcard 85: Identify the confound if healthier individuals both join groups and survive longer.

Answer: Preexisting health status confounds the sociality–survival relationship. Health status affects both group joining and survival outcomes.

Flashcard 86: Identify the most likely cost if larger groups show higher parasite loads but similar food intake.

Answer: Increased disease transmission is a cost of group living. Higher parasite loads indicate disease transmission costs of grouping.

Flashcard 87: Identify the correct conclusion if group living increases survival but decreases births per adult.

Answer: Net advantage depends on overall lifetime reproductive success. Total lifetime reproductive success determines evolutionary advantage.

Flashcard 88: What is alloparenting?

Answer: Care of offspring by individuals other than the genetic parents. Non-parents provide care, benefiting offspring and sometimes themselves.

Flashcard 89: What is the confusion effect in predator–prey interactions?

Answer: Predators have more difficulty targeting one individual in a group. Groups make it harder for predators to focus on one target.

Flashcard 90: Which option indicates reciprocal altruism: repeated help between nonrelatives or one-time help to offspring?

Answer: Repeated help between nonrelatives. Repeated exchange between non-relatives indicates reciprocal cooperation.

Flashcard 91: Which option is strongest evidence of information sharing: naïve individuals find food faster after joining groups?

Answer: Naïve individuals find food faster after joining groups. Improved foraging success demonstrates information transfer within groups.

Flashcard 92: Identify the correct claim if group size increases and per-capita food decreases while survival stays constant.

Answer: Competition costs rise; net advantage is uncertain without reproduction data. Increased competition may offset other benefits of group living.

Flashcard 93: Identify the best evidence for cooperative hunting advantage: higher capture success in groups or louder calls.

Answer: Higher capture success in groups. Higher success rates demonstrate cooperative hunting effectiveness.

Flashcard 94: Which option best supports dilution effect: constant attack rate or higher attack rate per individual?

Answer: Constant attack rate (per group) with lower risk per individual. Fixed attack rate with more individuals reduces per-capita risk.

Flashcard 95: Identify whether $rB > C$ is satisfied if $r=0.5$, $B=10$, and $C=4$.

Answer: Yes, because $0.5\times 10 = 5$ and $5 > 4$. $0.5 \times 10 = 5$, and $5 > 4$ satisfies Hamilton's rule.

Flashcard 96: Which statement best supports a causal benefit of sociality: random assignment to groups or self-selected groups?

Answer: Random assignment to groups. Random assignment eliminates selection bias and confounding variables.

Flashcard 97: Which option best supports the many-eyes hypothesis: earlier predator detection or faster growth?

Answer: Earlier predator detection. Earlier detection directly supports the many-eyes vigilance hypothesis.

Flashcard 98: What is a direct advantage of group living related to predation risk?

Answer: Reduced individual predation risk through dilution and vigilance. Group membership decreases individual risk of predator attacks.

Flashcard 99: Which study design most strongly supports a causal advantage of social behavior?

Answer: Controlled experiment manipulating group size or social access. Experiments control variables to establish causal relationships.

Flashcard 100: What is an ultimate explanation for social behavior?

Answer: Evolutionary function explaining how behavior increases fitness. Focuses on why the behavior evolved and its fitness benefits.