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The eggs of reptiles are typically surrounded by a leathery or hard shell, providing protection and preventing desiccation. Bird eggs are encased in a hard calcium carbonate shell, which offers structural support and safeguards the developing embryo. Mammals, particularly monotremes like the platypus, lay eggs surrounded by a shell, while most mammals give live birth, with the embryo developing inside the mother's body, surrounded by the placenta and amniotic fluid for nourishment and protection.
What else can I help you with?
Are penguins reptiles or mammals?
penguins are neither mammals or reptiles. penguins lay eggs.
Does a spider lay amniotic eggs?
No, only reptiles, mammals, and birds have amniotic eggs.
Are birds reptiles or mammals?
Birds are neither reptiles nor mammals. They are a separate class of vertebrate animals called Aves. Birds share characteristics with both reptiles and mammals, but they have distinct features that set them apart, such as feathers, beaks, and laying eggs.
How do mammals differ from birds?
Mammals have fur, and birds have feathersMost mammals give birth to living young and birds lay eggs
Does the octopus have an amniotic egg?
No, reptiles, mammals and birds have amniotic eggs because they lay their eggs on land.
What is the taxonomic class in which most species lay amniotic eggs?
Reptilia is the taxonomic class in which most species lay amniotic eggs. These eggs have a membrane that surrounds the developing embryo and provides protection and allows gas exchange. Reptiles, birds, and some mammals are examples of species that lay amniotic eggs.
How do polar bears lay their eggs?
Polar bears do not lay eggs: they give birth to live young, which is why they are called mammals, not birds or reptiles.
How do reptiles produce young?
How do Mammals reproduce? How do fish reproduce? How do Birds reproduce? Sex. Reptiles, like all of the other things I listed. Have sex.
When did mammals become land animals?
Mammals originated as land animals. Reptiles were the first vetebrates to have hard-shelled eggs and spend most of their time on land. Reptiles evolved into modern reptiles, mammals, and birds. Some mammals, since then, have moved partially or completely back into water.
Which class of animal has it baby by egg?
There are many animals that lay eggs. Mammals do not. Here is a list of a few: Birds and Reptiles are the main animals known to lay eggs. The Platypus, even though it's a mammal, does infact lay eggs. Those are the main groups that I know of.
Do mammles give birth or lay eggs?
Egg-laying mammals are known as monotreme. They are of the Order monotremata.Apart from monotremes, other animal groups which lay eggs are birds, reptiles fish and amphibians. Only the birds lay eggs exclusively. Among the reptiles, fish and amphibians, some are live-bearers.
Do reptiles lay eggs or born alive?
Eggs. Reptiles are cold blooded and NOT mammals.
