Amphibians are the first true tetrapods, or vertebrates with four limbs.
Frogs are amphibians and ducks are aves.
Frogs are the first true tetrapods, or vertebrates with four limbs.
The first true tetrapods, or vertebrates with four limbs include
Options:
[A] Schwinn
[B] frogs
[C] Man
[D] insects
[E] mammals
[F] bats
[G] Birds
[H] feet