Question

Mention one example each for animals with chitinous exoskeleton and those covered by a calcareous shell.

Answer 1

Animals with chitinous exoskeleton

Organisms of the phylum Arthropoda have a chitinous exoskeleton. This protects the internal organs and prevents desiccation.

Example: Periplaneta (cockroach).


Animals with calcareous shell

Molluscs possess a calcareous shell secreted by the mantle. This protects the soft parts of the body.

Example: Pila (apple snail).