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Chitinous exoskeleton is present in...

Chitinous exoskeleton is present in

A

roundworms

B

insects

C

Leeches

D

snails

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Chitinous Exoskeleton**: The question asks about the presence of a chitinous exoskeleton, which is a protective outer layer made of chitin. This type of exoskeleton is characteristic of certain animal groups. 2. **Identifying the Phylum**: Chitinous exoskeletons are primarily found in the phylum Arthropoda. This phylum includes a variety of organisms such as insects, arachnids, and crustaceans. 3. **Analyzing the Options**: - **Roundworms**: These belong to the phylum Nematoda (not Ashelmentis) and do not have a chitinous exoskeleton. They have a flexible cuticle instead. - **Insects**: Insects are part of the phylum Arthropoda and possess a chitinous exoskeleton. - **Leeches**: Leeches belong to the phylum Annelida and are segmented worms that do not have a chitinous exoskeleton; they have a soft body. - **Snakes**: Snakes belong to the phylum Chordata and have scales made of keratin, not a chitinous exoskeleton. 4. **Conclusion**: Among the options provided, only insects belong to the phylum that exhibits a chitinous exoskeleton. Therefore, the correct answer is **insects**. **Final Answer**: Insects (Option B) have a chitinous exoskeleton. ---
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