First slide

Classification of Animals

Question

Select the correct statement.

Easy

A

Scoliodon has a two-chambered systemic heart
B

Periplaneta has 13-chambered ventral heart
C

Alligator has a four-chambered myogenic heart
D

Rana has a three-chambered neurogenic heart

Solution

The heart of chordates (e.g., Scoliodon, Rana and Alligator) is myogenic while those of most nonchordates is neurogenic. Crocodilians (e.g., Alligator) have a four-chambered heart. The heart of fishes (e.g., Scoliodon) is a branchial heart (pumps blood only to the gills). The heart of Periplaneta is dorsal to the gut.

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