Tetrapods evolved from

A) aquatic invertebrate ancestors.
B) terrestrial invertebrate ancestors.
C) scratch.
D) a and b
E) none of the above

Tetrapods

Describes a group of vertebrates that includes amphibians, reptiles, birds, and mammals, all characterized by having four limbs or limb-like appendages.

Aquatic Invertebrate

Aquatic invertebrates are animals without backbones that live in water environments; these include species such as mollusks, worms, and corals.

Terrestrial Invertebrate

An animal lacking a backbone, living on land, such as insects, spiders, and worms.