In late Paleozoic Era .
Amphibia .
no. amphibians were
Amphibians (frogs, newts, toads and salamanders).
no
A dolphin is a vertebrate because it does not have a shell or live in a shell or for another answer he has an back bone
The first animal to live on land was probably an amphibian.
A lion is a vertebrate, as it has a spine, gives live birth, and suckles their young.
humans (cavemen)
......fish.
monkies and birds
It depends where you live
a lizard