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All groups of animals lay eggs. The one most commonly defined as non-egg-laying is the group known as mammals. Almost all mammals give birth to live young. The exception to this are the three species of monotremes, or egg-laying mammals, and they include the platypus and the two species of echidnas.

Within the other vertebrate groups, only the "Birds" are all egg-layers. There are some species of fish, reptile and amphibians which do not lay eggs.

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Eloise Upton

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2y ago
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12y ago

All groups of animals lay eggs. The one most commonly defined as non-egg-laying is the group known as mammals. Almost all mammals give birth to live young. The exception to this are the three species of monotremes, or egg-laying mammals, and they include the platypus and the two species of echidnas.

Within the other vertebrate groups, only the "Birds" are all egg-layers. There are some species of fish, reptile and amphibians which do not lay eggs.

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10y ago

mammals :)

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Q: Which group of animals does not lay egg?
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Define the group for egg laying creatures?

Tetrapod's are the group of animals that lay eggs. Animals have been laying eggs for a long time. Snails, fish, and many other animals lay eggs from which their young hatch.


What kinds of animals whose lay with egg?

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Animals that lay eggs, that have little or no other development within the mother are known as Oviparous animals. Types of animals that lay eggs are birds, reptiles, insects, fish, monotremes and molluscs.


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