Multiple Choice
Which of the following could be considered the most recent common ancestor of living tetrapods?
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21. Evolution
Introduction to Evolution and Natural Selection
Multiple Choice
In the context of evolution and natural selection, altruism is which of the following?
A
A behavior that is only observed in non-social species
B
A behavior that benefits another individual at a cost to oneself
C
A behavior that has no impact on the fitness of any individual
D
A behavior that increases an individual's own survival and reproduction
Verified step by step guidance1
Understand the concept of altruism in biology: Altruism refers to a behavior by an individual that increases the fitness of another individual while potentially decreasing the fitness of the actor.
Consider the context of evolution and natural selection: In evolutionary terms, behaviors that seem altruistic can be explained by the benefits they provide to relatives or the group, which can indirectly benefit the altruistic individual.
Evaluate the options given: The correct definition of altruism in this context is a behavior that benefits another individual at a cost to oneself.
Eliminate incorrect options: Altruism is not typically observed in non-social species, as it often involves interactions within a group. It also does not refer to behaviors that have no impact on fitness or that increase one's own survival and reproduction.
Conclude with the correct understanding: Altruism in the context of evolution and natural selection is a behavior that benefits another individual at a cost to oneself, often explained by kin selection or reciprocal altruism.
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