They all have mammalia and nipples.
Birds and mammals are air breathers. Lampreys are not.
Dinosaurs are more closely related to mammals. Both mammals and dinosaurs share a reptilian ancestor that they don't share with amphibians.
Mammals are the only creatures to feed their young on mother's milk.
Dolphins are warm blooded like other mammals.
urethra
a few but not all and i only have one to share with you, the bat
Just the bat.
there all mammals
Platypuses and echidnas are different from other mammals because they are monotremes, i.e. mammals which lay eggs.
Marsupials are mammals, so share all features with other mammals. As well, they are vertebrates, so share the characteristic of having a backbone with birds, fish, reptiles and amphibians. Like birds and reptiles, mammals breathe via lungs (rather than gills), and like birds, they are warm-blooded.
where can you find the answer too. Using dot points to explane some of the feautures to hairdressing agreement \
Both are amniotic oxygen-breathing vertebrates.