Why Do Yellow-Bellied Marmot Females Live Two to Five Per

question 51

Multiple Choice

Why do yellow-bellied marmot females live two to five per den? Wouldn't it be better for them to each have their own den?

• A) One den per female might be better, but there aren't enough dens to go around.
• B) One female can't care for a litter of offspring by herself, so they have to live together and cooperate.
• C) One male can mate with two to five females, so he will work to defend one den for that many.
• D) The only way a female can defend a den from predators is if she has help.
• E) There are more females than males, so this is the only way everyone gets to mate.

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