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Question no. 44157

Which mammal holds the record for the briefest known gestation period, lasting only 12 to 13 days?

Select your answer for: Which mammal holds the record for the briefest known gestation period, lasting only 12 to 13 days?
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Answer: A. Opossum

Explanation

Opossums hold the record for having one of the briefest known mammalian gestation periods. Their internal pregnancy lasts for only about twelve to fourteen days before birth occurs. As marsupials, their underdeveloped young complete development externally inside a specialized pouch. Marsupials give birth to extremely premature young that must crawl instinctively to their mother's teat. This unique reproductive strategy allows females to reproduce quickly despite environmental pressures. The Virginia opossum is the most well-known marsupial species native to North America.

Studying marsupial reproduction provides evolutionary biologists with insights into diverse mammalian life cycles. Opossums play a helpful role in local ecosystems by consuming large numbers of ticks and insects. Understanding gestation lengths helps wildlife rehabilitators care for injured or orphaned wild animals. Cats have a much longer gestation period lasting approximately sixty to sixty-five days. Elephants possess the longest mammalian gestation period, which stretches for nearly twenty-two months. Mice have relatively short pregnancies of about nineteen days, which still exceeds opossums.

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