Arthropods lack

Arthropodes are organisms with chitinous exoskeleton. Suppose exoskeleton is absent in arthropods. List the difficulties arthropodes has to face.

Arthropods are characterised by

Arthropods are the first to have

Moulting in arthropods facilitates

Some Important Arthropods

Arthropods have ……………. Cirulatory system.

Exoskeleton of Arthropods are formed of______.