Which of these statements are correct? (i) All vertebrates have four-chambered hearts. (ii) Deoxygenated and oxygenated blood are separated in animals with high energy needs. (iii) Fishes have double circulation.

Which of these statements are correct? (i) All vertebrates have four

1.	Which of these statements are correct? (i) All vertebrates have four-chambered hearts. (ii) Deoxygenated and oxygenated blood are separated in animals with high energy needs. (iii) Fishes have double circulation.
Answer» Which of these statements are correct? (i) All vertebrates have four-chambered hearts. (ii) Deoxygenated and oxygenated blood are separated in animals with high energy needs. (iii) Fishes have double circulation.