Practice question · Match the pairs
Match each concrete case to the concept it illustrates.
- A sterile worker bee raising her many sisters
- Vampire bats sharing blood with roost-mates who reciprocate
- Helping favored when relatedness-weighted benefit beats the cost
- An alarm call that endangers the caller but warns the group
- Inclusive fitness / kin selection
- Altruism (by fitness consequences)
- Reciprocal altruism
- Hamilton's Rule
Hints
- Reason from each case to the concept, not to a bare definition.
- A non-relative who repays points to reciprocal altruism; a costly warning points to altruism defined by fitness.
Show the answer
- A sterile worker bee raising her many sisters → Inclusive fitness / kin selection
- Vampire bats sharing blood with roost-mates who reciprocate → Reciprocal altruism
- Helping favored when relatedness-weighted benefit beats the cost → Hamilton's Rule
- An alarm call that endangers the caller but warns the group → Altruism (by fitness consequences)
Why
A sterile helper illustrates inclusive fitness, reciprocating bats illustrate reciprocal altruism, the rb > c condition is Hamilton's Rule, and a costly alarm call is altruism defined by its fitness consequences. Each case fingerprints one concept.
Practise Social Behavior and Altruism
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