First slide

Classification of Animals

Question

Select the correct matching of a phylum and its general characters.

Easy

A

Echinodermata – Water vascular system and proboscis gland
B

Mollusca – Chitinous cuticle and radula
C

Chordata – Dorsal nerve cord and ventral heart
D

Cnidaria – Cnidocytes and comb plate

Solution

Chordates are characterised by the presence of a dorsal, single and hollow nerve cord. Their heart is ventral to the gut. In nonchordates, if present, the nerve cord is ventral, and the heart is dorsal. Proboscis gland is characteristic of hemichordates. A chitinous cuticle is present in arthropods. Comb plates are present in ctenophores.

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