Question

Class Crustacea differs from Insecta in having:

• A. two pairs of antennae
• B. jointed foot
• C. chitinous cuticle
• D. none of the above

Answer 1

Answer: (A)

The main characteristics of class Crustacea and Insecta are as follows :
(1) Class Crustacea : Mostly aquatic with gills, two pairs of antennae and atleast three pairs of jaws, appendages mosty 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.