A) two pairs of antennae
B) jointed foot
C) chitinous cuticle
D) none of the above
Correct Answer: A
Solution :
The main characteristics of class Crustacea and Insecta are as follows: (1) Class Crustacea: Mostly aquatic with gills, two pairs of antennae and at least three pairs of jaws, appendages mostly biramous and always more than four in the trunk region. Example: prawn, crab, lobster etc. (2) Class Insecta: Hexapod arthropods with a pair of antennae and three pairs of Jaws. Example: cockroach, grasshopper, bees, housefly etc.
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