This is 'convergent evolution', where completely different, unrelated organisms develop a similar feature.
No. An otter is a mammal. An example of an amphibian would be a frog or toad.
No, they are endothermic
amphibian
No it is warm blooded and gives birth to live young so it is a mammal. A frog is an example of a amphibian.
No, a dolphin is a mammal, not an amphibian.
A rhinoceros is a mammal, not an amphibian.
amphibian
A chimpanzee is a mammal
A bat is a mammal.
MAMMAL
An orangutan is a mammal.
The donkey is a mammal. The frog is an amphibian.