Rats give birth to live young and suckle them.
The two definitive characteristics that make the platypus a mammal are: 1. It nurtures its young on mothers' milk. 2. It has fur. No other group of animals both these characteristics.
Because it has fur and feeds its young with milk. Those are two characteristics every mammal has.
two chains
Warm blooded, has live birth.
No. Rodents are placental mammals and kangaroos are marsupials. The two are not even remotely related. Confusion can arise from the fact that there are kangaroo rats, which are rodents of North America, and rat-kangaroos which are marsupials, and members of the kangaroo family in Australia.
A platypus is a mammal and it has a duck-like bill and duck-like webbed feet.
It can make the baby throuh up, for up to two days.
The kangaroo rat is a placental mammal (and a different species from the marsupial known as the rat-kangaroo of Australia). Therefore, it gives birth to live young. The only egg-laying mammals are monotremes, which includes just the platypus and the two species of echidna.
A frog is neither a mammal nor a reptile. Frogs are amphibians, a separate class of animals that have unique characteristics such as a moist skin and a two-stage life cycle involving both water and land.
The desert kangaroo rat (which is different from the rat-kangaroos of Australia) have two long, strong hind legs and two shorter forelegs.
There are two basic types of rats. Black/roof rats and Norway/brown rats. The brown rat, is also known as the Norway rat, house rat, gray rat, barn rat, and wharf rat, is one of the best-known and is the larger of the two. Roof rats are also called black rats and ship rats.
A fish heart has two chamber and a mammal has 4.