Which of the following is true?
1
Amphibians have a 3-chambered heart with two atria and a single ventricle
2
Fishes have a 3-chambered heart with two atria and a single ventricle.
3
Amphibians have a 3-chambered heart with a single atria and two ventricles.
4
Fishes have a 3-chambered heart with a single atria and two ventricles.