Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 54 - Behavioral Biology - Review Questions - Apply: 4

Answer

The two can be distinguished by moving animals to see if non-kin are treated the same as kin. If so, then reciprocity is probably the cause; if not, then kin selection is probably responsible. The altruism is never ultimately costly--it is a question of apparent immediate cost vs. long term benefit to one's genes.

Work Step by Step

The key here is to see that the difference can be tested by switching animals from interacting with kin to interacting with non-kin to differentiate between kin-selection and reciprocity.
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