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Ventral nerve cord arises from...

Ventral nerve cord arises from

A

Supra-pharygeal ganglion

B

Circum pharyngeal connectives

C

Sub-pharyngeal ganglion

D

All of these

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks where the ventral nerve cord arises from. This requires knowledge of the anatomy of the nervous system in certain organisms, particularly in invertebrates like annelids and arthropods. 2. **Identifying the Options**: The options given are: - (A) Suprafarangial ganglion - (B) Circumpharyngeal connectives - (C) Subpharyngeal ganglion - (D) All of these 3. **Analyzing Each Option**: - **Option A: Suprafarangial ganglion**: This ganglion is located above the pharynx. The ventral nerve cord does not arise from this structure. - **Option B: Circumpharyngeal connectives**: These connectives encircle the pharynx but do not serve as the origin of the ventral nerve cord. - **Option C: Subpharyngeal ganglion**: This ganglion is located below the pharynx and is indeed the origin of the ventral nerve cord. - **Option D: All of these**: Since only the subpharyngeal ganglion is the correct origin, this option is incorrect. 4. **Conclusion**: The ventral nerve cord arises from the subpharyngeal ganglion. Therefore, the correct answer is **Option C**. ---
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks where the ventral nerve cord arises from. This requires knowledge of the anatomy of the nervous system in certain organisms, particularly in invertebrates like annelids and arthropods. 2. **Identifying the Options**: The options given are: - (A) Suprafarangial ganglion - (B) Circumpharyngeal connectives - (C) Subpharyngeal ganglion ...
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