Which of the following has a three-chambered heart?
(a) pigeon
(b) lizard
(c) fish
(d) lion
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Solution
B) lizard Lizard is a reptile and it has a three-chambered heart. Birds (e.g. Pigeon) and mammals (e.g. lion) have a four-chambered heart, while Pisces (e.g. fish) have a two-chambered heart.