* birds * reptiles * fish * amphibians * invertebrates, including crustaceans, molluscs, insects, arachnids, etc
Mammals Have Hair Or Fur, Non-Mammals Don't.
Sharks are NOT mammals.
It depends on what you mean by non-mammals. If you are counting all matter as a non-mammal, then most non-mammals are not organisms. If you are counting a non-mammal as any life form or any animal that is not a mammal, then all non-mammals are organisms.
if your talking about what is the difference between mammals and non-mammals, the difference is: the non-mammals lay eggs and the mammals just have baby's out their vagina.. XD
vertebrae and invertebrate
mammals can give birth to live young they have hair on their bodies and they can produce milk.
The echidna and the platypus are non-placental mammals. They are monotremes, or egg-laying mammals. Kangaroos, wallabies, koalas, bandicoots, wombats and Tasmanian devils are just a few other non-placentals, as they are marsupials.
All extant mammals have some form of hair. No non-mammals have hair. Mammals have warm-blood. Non-mammals, with the exception of birds, are cold-blooded. Reptiles and birds have scales, but amphibians do not. Sponges do not have hearts or vertebrae. In short, there is not a whole lot that all non-mammals have in common, except the state of not being a mammal.
Yes, bats are non-placental mammals
No, I don't know exact numbers but mammals are outnumbered greatly by fish, reptiles & insects
Kangaroos are non-placental mammals
mammals