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What animals have a amnion?

Updated: 8/11/2023
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11y ago

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No. Amniotes are a group of creatures whose eggs are adapted to live on land by use of one or more membrane layers surrounding the developing embryo, including placental mammals, egg laying mammals, reptiles and birds.

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8y ago
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11y ago

In amniotes this amniotic sac is helpful in holding the developing embryo.The amniotic sac and its filling provide a liquid that surrounds and cushions the fetus. It allows the fetus to move freely within the walls of the uterus. Buoyancy is also provided.

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9y ago

An animal that is an amniote is an animal whose embryo develops into an amnion and chorion and has an allantois; i.e. a mammal, bird, or reptile.

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13y ago

Frogs and fish don't have amniotic layers everything else does have them.

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13y ago

An amniotic egg is an egg produced by reptiles, birds, and prototherian (egg-laying) mammals (amniotes), more commonly known as monotremes.

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11y ago

All mammals have an amniotic sac,Snapping turles have a type of sac/membrane within their eggs, I don't know if that would be considered an amniotic sac or not.

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