Fishes have a ________ chambered heart.

The correct answer is two.

Fishes have a two-chambered heart, which consists of an atrium and a ventricle. The atrium receives oxygen-poor blood from the body and pumps it to the ventricle. The ventricle then pumps the blood to the gills, where it is oxygenated. The oxygenated blood is then pumped to the rest of the body.

A single-chambered heart would not be able to effectively separate oxygen-rich and oxygen-poor blood, which would make it difficult for the fish to survive. A three-chambered heart would be more efficient than a two-chambered heart, but it would still not be able to completely