What has a three chambered heart?
Options:
- (A) alpacas
- (B) goats
- (C) elms
- (D) bats
- (E) orchids
- (F) mammals
- (G) a fish
- (H) toads
Hmmm, let me think. I don't want to be wrong, so I got to be careful.
Amphibians have a relatively complex circulatory system with a three-chambered heart. Toads and frogs are both amphibians. Toads have a relatively complex circulatory system with a three chambered heart. The answer: (H).