First slide

Classification of Animals

Question

Which of the following animal groups is correctly paired with its characteristic?

Moderate

A

Porifera - Central cavity called spongocoel lined by pinacocytes
B

Mollusca - A soft and spongy layer of skin forms a mantle over the visceral hump
C

Cnidaria - Gastro-vascular cavity with two openings
D

Arthropoda - Mostly monoecious and viviparous

Solution

A soft and spongy layer of skin forms a mantle over the visceral hump in molluscs.
Spongocoel is lined by choanocytes (not pinacocytes).
Gastro-vascular cavity has a single opening, mouth on hypostome.
Arthropods are mostly dioecious and mostly oviparous.

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