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Do mammals have a watertight egg?

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Anonymous

14y ago
Updated: 8/17/2019

The only mammals which lay eggs (monotremes) are the platypus and the echidna. These two monotremes lay soft, leathery eggs. The eggs will keep out water to some extent, but they are not watertight. Nor do they need to be - both animals incubate their young on land, not in the water.

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Wiki User

14y ago

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