mice
Yes, mammals are divided into many sub-groups.
Mammals has these 3 groups .
There are five groups of vertebrates; fish, amphibians, reptiles, birds and mammals.
no they do not. Mammals are divided into three groups; monotremes, marsupials, and placental mammals.
Mammals and birds are endothermic.
for saftey
Dolphins are mammals, specifically they are cetaceans.
Birds,Mammals ,Fish ,Reptile Ampipian
Monotremes, marsupials, and placental mammals.
The 5 groups of vertebrates are fish,amphibians,mammals,reptiles and birds. Vertebrates are animals with a backbone.
birds and mammals are endothermic chordates
These humans that you speak of belong to the placental group of mammals