The first tetrapods were
major threat to health remains of prehistoric life in the frog family running and lifting competing for resources warm-blooded objects that have mass graptolites
A B C D E F G H
All frogs are amphibians.
Animals in the frog family are the first true tetrapods.
The first tetrapods were (A) major threat to health (B) remains of prehistoric life (C) in the frog family (D) running and lifting (E) competing for resources (F) warm-blooded (G) objects that have mass (H) graptolites