if they are unknown how would be know about them?
That information is unknown. Probably the same way mammals do.
It is unknown because there are different types of animals that we can discover. There can be different reptiles, insects, birds and mammals.
Yes, in the sense that humans are mammals. The indefinite pronoun 'everyone' is a word for an unknown or unnamed number of people, or a word for people in general.
Yes, all mammals have a skeleton.Yes, all mammals have a skeleton.Yes, all mammals have a skeleton.Yes, all mammals have a skeleton.Yes, all mammals have a skeleton.Yes, all mammals have a skeleton.
Mammals. Mammals.
Mammals Have Hair Or Fur, Non-Mammals Don't.
We are mammals, and mammals are one category of animal, so we are both animals and mammals.
yes, badgers are mammals
Sharks are NOT mammals.
Most Australian mammals are marsupials unlike American mammals.
No, all sea animals are not mammals. Fishes are not mammals, but dolphins are mammals.
Yes, they are placental mammals. Most mammals are placental. The other two options are marsupial mammals (mammals with a pouch) and monotreme mammals (mammals that lay eggs).