There is no such thing as an "early mammal".
Monotremes lay eggs, but there is a misconception that monotremes are the most primitive of mammals. Science has recently proven that monotremes are not primitive mammals at all.
All seals are mammals, and mammals (apart from the monotremes) have 'babies', they do not lay eggs.
No. Bears are mammals, like all mammals they give birth to live offspring.
No they don't, they give birth. As do all Mammals, and bunnies are mammals.
Yes. Seals are mammals, and all mammals give live birth. Bonye Seals are mammals, however, not all mammals give live birth. There are five mammals that lay eggs.
No. Rabbits do not lay eggs. They are placental mammals. The only mammals which lay eggs are the monotremes, which include the platypus and the echidna.
No. Only female platypuses and echidnas lay eggs. They belong to the group of mammals known as monotremes.
Cheetahs are mammals in the cat family, and thus, like all mammals, have live young. They do not lay eggs.
Pigs, like all mammals, give birth to live young. They do not lay eggs. (Platypuses are the only mammals that lay eggs.)
all mammals and prokaryotes
all mammals and prokaryotes
Badgers are mammals and they give birth to live young.
There are no marine mammals which lay eggs. Apart from the monotremes (egg laying mammals), which include just the platypus and two species of echidnas, no mammals lay eggs. Therefore, all the mammals in the tropical ocean give birth to live young.