They live on land, can't hold for too long under water except for some animals.
Yes. Apes are mammals, and one of the defining characteristics of mammals is that they have hair.
If mermaids existed (which they don't) they would presumably be mammals. At least, most depictions of mermaids show them with obvious mammalian characteristics (specifically, obvious human characteristics; most mammals do not have large, permanent breasts).
birds
Bats are not birds because they are mammals as they have the characteristics of a mammal. They have these characteristics which enable them to be classified as mammals. They are warm blooded, and they have fur.
what is the lithshpere and describe it
what is the lithshpere and describe it
It is cardiovascular.
An order of mammals similar to bats.
not all mammals have five fingers and pose able thumbs and our hands are not harry
Whales ARE mammals. They have all the characteristics of mammals. Live birth, nurse their Young, Breathe with lungs, etc etc
No. Despite sharing some characteristics mammals and birds are not closely related.
Because they have the characteristics of mammals: -live birth -nurse their young - body hair -etc