Question

Crustaceans are distinguished from insects by the presence of

• A. $1^{st}$pair of antennae
• B. Jointed appendages
• C. Body divisions
• D. Body divisions and number of appendages

Answer 1

The correct option is D Body divisions and number of appendages

Crustaceans form a very large group of arthropods which includes crabs, lobsters, crayfish, krill etc. They are distinguished from other groups of arthropods such as insects by the possession of biramous (two-parted) limbs, and by the nauplius form of the larvae.
Therefore, the correct answer is option D.