What has a relatively complex circulatory system with a three-chambered heart?
frogs a fish salmon alpacas Man Birds sharks pan
A B C D E F G H
All frogs are amphibians.
Frogs have a relatively complex circulatory system with a three-chambered heart.
What has a relatively complex circulatory system with a three-chambered heart? (A) frogs (B) a fish (C) salmon (D) alpacas (E) Man (F) Birds (G) sharks (H) pan