Which of the following is a vestigial organ

Options

A. Vermiform appendix
B. Atlas
C. Premolars
D. Incisors

Answer

**Step-by-Step Solution:**

1. **Understand the Concept of Vestigial Organs:**
- Vestigial organs are structures in the body that have lost most or all of their original function through the course of evolution. They are remnants of organs that were functional in ancestral species.

2. **Analyze the Given Options:**
- The question provides several options, and we need to evaluate each one to determine if it is a vestigial organ.

3. **Evaluate the First Option - Incisors:**
- Incisors are the front teeth in mammals that are used for biting food. Since they serve a clear function, they are not vestigial organs.

4. **Evaluate the Second Option - Premolars:**
- Premolars are transitional teeth located between canines and molars. They are used for crushing and tearing food. Therefore, they also have a function and are not vestigial organs.

5. **Evaluate the Third Option - Atlas:**
- The Atlas is a vertebra that supports the skull and allows for the nodding motion of the head. It has a significant function in the skeletal system, so it is not a vestigial organ.

6. **Evaluate the Fourth Option - Vermiform Appendix:**
- The vermiform appendix is a small, tube-like structure attached to the large intestine. It is considered a vestigial organ in humans as it has no significant function in digestion, although it may have had a role in the digestive systems of our ancestors.

7. **Conclusion:**
- Based on the evaluations, the correct answer is the **Vermiform Appendix**, as it is recognized as a vestigial organ in the human body.

**Final Answer: Vermiform Appendix**

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