The first true tetrapods, or vertebrates with four limbs include
Schwinn frogs Man insects mammals bats Birds feet
A B C D E F G H
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 (A) Schwinn (B) frogs (C) Man (D) insects (E) mammals (F) bats (G) Birds (H) feet