Which statement distinguishes altricial and precocial young in mammals?

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Prepare for the March Mammal Madness Vocabulary Test. Use flashcards and multiple choice questions with hints and explanations to enhance your learning experience. Get yourself ready for the exciting challenge!

Multiple Choice

Which statement distinguishes altricial and precocial young in mammals?

Explanation:
The key idea is how developed and independent mammals are at birth. Altricial young are born helpless: they’re often blind, naked or sparsely furred, unable to walk or keep warm on their own, and they rely on parental care. Precocial young, by contrast, are born relatively mature: they have fur, open eyes, and can move around and typically feed themselves soon after birth. This contrast makes the statement describing altricial young as helpless at birth and precocial young as relatively mature and mobile at birth the best fit. Other options focus on fur alone or on rapid postnatal behavior that isn’t the defining difference.

The key idea is how developed and independent mammals are at birth. Altricial young are born helpless: they’re often blind, naked or sparsely furred, unable to walk or keep warm on their own, and they rely on parental care. Precocial young, by contrast, are born relatively mature: they have fur, open eyes, and can move around and typically feed themselves soon after birth. This contrast makes the statement describing altricial young as helpless at birth and precocial young as relatively mature and mobile at birth the best fit. Other options focus on fur alone or on rapid postnatal behavior that isn’t the defining difference.

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