First slide

Classification of Animals

Question

Choose the correct set of features of Osteichthyes.
(a) Air sac
(b) Air bladder
(c) Claspers
(d) Cloaca
(e) Operculum
(f) Osphradium

Moderate

A

(a) and (e)
B

(b) and (e)
C

(b) and ©
D

(d) and (f)

Solution

Osteichthyes are bony fishes with air bladder (for buoyancy) and operculum (gill cover).
Sharks have claspers and cloaca.
Air sacs supplement respiration in birds.
Osphradium is a chemoreceptor that monitors the water currents entering the mantle cavity in molluscs.

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