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2 votes
A male stickleback fish will attack other male sticklebacks that invade its nesting territory, it only attacks males with the red belly. why has natural selection favored this

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User TechGuy
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1 Answer

5 votes
flatwing males favored by natural selection. behavior: a male stickleback fish attacks other male sticklebacks that invade its nesting territory. proximate cause:red belly of intruding male acts as sign stimulus that releases aggression in male sticklebacks.
answered
User Vsplit
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