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Monotremes (/ ˈ m ɒ n ə t r iː m z /) are mammals of the order Monotremata. They are the only group of living mammals that lay eggs, rather than bearing live young. The extant monotreme species are the platypus and the four species of echidnas. Monotremes are typified by structural differences in their brains, jaws, digestive tract ...
Monotremes differ from other mammals because they lay eggs instead of giving birth. There are only five species of monotremes, and they include the platypus and four species of echidnas (spiny ...
Together with the four species of echidna, it is one of the five extant species of monotremes, mammals that lay eggs instead of giving birth to live young. [6] Like other monotremes, the platypus has a sense of electrolocation, which it uses to detect prey in cloudy water. [7]
The four extant species of echidnas and the platypus are the only living mammals that lay eggs and the only surviving members of the order Monotremata. [3] The diet of some species consists of ants and termites, but they are not closely related to the American true anteaters or to hedgehogs. Their young are called puggles.
The egg-laying mammal, named after ... “The reason it appears so unlike other mammals is because it is a member of the monotremes – an egg-laying group that separated from the rest of the ...
However, the five species of monotreme, the platypuses and the echidnas, lay eggs. The monotremes have a sex determination system different from that of most other mammals. [2] In particular, the sex chromosomes of a platypus are more like those of a chicken than those of a therian mammal. [3]
There are only five existing species of monotremes: the platypus and four species of echidna. “To a biologist, the idea that that branch could go extinct would be a great tragedy,” Kempton said.
Most arthropods, vertebrates (excluding live-bearing mammals), and mollusks lay eggs, although some, such as scorpions, do not. Reptile eggs, bird eggs, and monotreme eggs are laid out of water and are surrounded by a protective shell, either flexible or inflexible. Eggs laid on land or in nests are usually kept within a warm and favorable ...