what is a charateristic of egg-laying mammals?

Answer 1

Monotremes (egg-laying mammals) are like other mammals in that they are warm-blooded with a high metabolic rate (though not as high as other mammals); have hair on their bodies; produce milk to feed their young; have a single bone in their lower jaw; and have three middle ear bones.

In a number of other respects, monotremes are rather derived, having highly modified snouts or beaks, and modern adult monotremes have no teeth. They are orphologically unique, they have many reptilian characteristics. they have birdlike skull with elongated rostrum, they have a pectoral girdle splayed as in reptiles, they have a pelvic girdle mammal-like, and epipubic bones that come up from the pelvis along the ventral surface

Answer 2

I believe there are only 3 known monotremes. The Platypus, and the Short Beaked Echidna from Australia and the Long Beaked Echidna of PNG. Monotremes nurse their young like other mammals, but don't actually have proper teats. They have glands on their belly that exude the milk, and the babies lap it up. Young Echidnas are known as Puggles. Echidnas only carry their young with them for a short time. They do don't have a proper pouch. The puggle holds on to couse hairs on mum's belly. While still quilless pinkys they are put down a burrow and buried. The mum only returns to the burrow every few days to feed the puggle. There have been very few Platypus bred in captivity. And I believe Healesville Sanctuary is the leading breeding program in Aus.

Answer 3

Besides what Mandy said, I believe there are currently only five known living species of egg laying mammals All egg laying mammals are found in the Australia and Papua New Guinea area. The species includes the Platypus and 4 species of Echinda.