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Phylum - Hemichordata Video Lecture | Biology Class 11 - NEET

FAQs on Phylum - Hemichordata Video Lecture - Biology Class 11 - NEET

1. What are the characteristics of Hemichordata?

Ans. Hemichordata is a phylum of marine animals that exhibit both chordate and non-chordate characteristics. They are characterized by the presence of a dorsal nerve cord, pharyngeal slits, and a muscular proboscis. They also possess a coelom, a digestive system, and a circulatory system.

2. How do Hemichordata obtain their food?

Ans. Hemichordata obtain their food through filter feeding or deposit feeding. Filter feeding species use their pharyngeal slits to filter small particles from the water, while deposit feeding species ingest sediment and extract organic matter from it.

3. Are Hemichordata hermaphroditic?

Ans. No, Hemichordata are not hermaphroditic. They have separate sexes, with individuals being either male or female. They reproduce sexually, with fertilization occurring externally in the water.

4. What is the significance of Hemichordata in the ecosystem?

Ans. Hemichordata play an important role in the marine ecosystem as filter feeders and decomposers. They help maintain water quality by filtering out small particles, and their feeding activities contribute to the breakdown of organic matter, recycling nutrients back into the ecosystem.

5. How are Hemichordata related to other phyla?

Ans. Hemichordata are considered to be closely related to echinoderms and chordates. They share some anatomical and developmental characteristics with these phyla, including the presence of pharyngeal slits and a dorsal nerve cord. This suggests a common ancestry and evolutionary relationship between these groups.

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Jul 15, 2025 Last updated

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