alleryThe frog heart has how many chambers?
ATwo chambers (one atrium, one ventricle)
BFour chambers (2 atria + 2 ventricles)
CThree chambers (2 atria + 1 ventricle)
DFive chambers (4 standard + the bulbus)
Answer & Solution
Correct answer: C. Three chambers (2 atria + 1 ventricle)
Frog (and most amphibians) have a 3-CHAMBERED heart: 2 atria + 1 ventricle.
Mixing of oxygenated + deoxygenated blood occurs in the ventricle (less efficient).
Fish = 2; birds + mammals = 4.
Keep practising Unit 7C1: Evolution & Animal Structural Organisation
Browse all Unit 7C1: Evolution & Animal Structural Organisation questions for AP Biology, or explore more Biology topics.
Related questions
Which pair of features is characteristic of phylum Aschelminthes?An animal has a body plan that is diploblastic, radially symmetrical and lacks a coelom. TWhich of the following is NOT correctly matched with its phylum?Cnidarians that exhibit polyp and medusa alternating in the life cycle (Metagenesis) incluIn sponges the cells lining the spongocoel and canals areThe correct sequence of increasing organisational complexity in Animalia isBioluminescence — the ability of a living organism to emit light — is well-marked in membeParapodia used for locomotion in the aquatic annelid Nereis are best described as