As a matter of fact there are only 2 types of mammals that lay eggs in the world nowadays. The egg is the organic vessel containing the zygote in which an embryo develops until it can survive on its own at which point the animal hatches.
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Which mammals lay eggs.
How many mammals lay eggs. Though most mammals are not capable of laying eggs there are two egg laying types of mammals. Cats dogs elephants giraffes whales dolphins porpoises and obviously homo sapiens are all viviparous mammals on the other hand there are mammals that lay eggs and are called monotremes the word monotreme is derived from the greek word monos meaning single and trema that means hole. In some ways monotremes are very primitive for mammals because like reptiles and birds they lay eggs rather than having live birth.
Reptile eggs bird eggs and monotreme eggs are laid out of water and. Egg laying mammals generally hatch within just 10 days of being laid a much shorter time than that of similarly sized egg layers. Mammals are warm blooded animals that give birth to live young.
Female platypus can lay two eggs at a time while an echidna can lay only one egg at a time. In addition they lay eggs rather than bearing live young but like all mammals the female monotremes nurse their young with milk. The duck billed platypus and the echidna.
The monotremes are typified by structural differences in their brains jaws digestive tract reproductive tract and other body parts compared to the more common mammalian types. These are known as monotremes. All of the extant species of monotremes are quite involved parents.
The eggs are retained for quite a long time absorbing nutrients from the mother. It is a normal thing for mammals to not lay eggs but it is a rare and unique case when they do lay egg. A female platypus lays eggs in the special holes or burrows while a female echidna on the other hand lays egg in her pouch.
An egg results from fertilization of an egg cell most arthropods vertebrates excluding live bearing mammals and mollusks lay eggs although some such as scorpions do not. The echidna is a type of mammal that lays eggs. There are many other differences in their body structure feeding habits diet and so on.
Do mammals lay eggs. How do egg laying mammals raise their young. This case is known as monotremes the term that refers to the structural differences in the animals of that group.
All mammals have a type of sexual reproduction by which a cell from the female of a species is fertilized by a cell from the male the main differentiation within mammal species is between those which grow the fetus inside the body and those which lay eggs. By victor kiprop on september 28 2018 in world facts. In a number of other respects monotremes are rather derived having highly modified snouts or beaks and modern adult monotremes have no teeth.
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