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Nervous system of ctenophores is simila...

Nervous system of ctenophores is similar to

A

cnidaria

B

platyhelminthes

C

parazoa

D

sponges

Text Solution

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The correct Answer is:
To answer the question about the similarity of the nervous system of ctenophores, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Ctenophores**: Ctenophores, also known as comb jellies, belong to a phylum characterized by a simple and primitive nervous system. They do not possess a centralized brain or a complex nervous system. 2. **Nervous System Structure**: The nervous system in ctenophores is organized as a nerve net. This means that instead of having a centralized structure, the nerves are arranged in a mesh-like network, allowing for basic coordination of movements. 3. **Comparison with Other Phyla**: To find a similar nervous system, we need to look at other phyla. The phylum that shares a similar nerve net structure is the phylum **Cnidaria**. Like ctenophores, cnidarians (which include jellyfish, corals, and sea anemones) also exhibit a nerve net. 4. **Elimination of Other Options**: - **Platyhelminthes** (flatworms) have a more advanced nervous system with a centralized structure, so they do not match. - **Porifera** (sponges) lack a nervous system entirely, so they are also not similar. - Therefore, the only phylum that exhibits a similar nerve net organization is **Cnidaria**. 5. **Conclusion**: The nervous system of ctenophores is similar to that of the phylum **Cnidaria**. ### Final Answer: The nervous system of ctenophores is similar to that of the phylum **Cnidaria**.
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