Presence of tail in new born baby is an example of:

Options

A. Atavism
B. Vestigial organs
C. Homology
D. Analogy

Answer

To solve the question regarding the presence of a tail in a newborn baby, we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question asks about the presence of a tail in a newborn baby and what it signifies in terms of biological concepts.

2. **Analyzing the Options**:
- **Endoption**: This term does not relate to the context of evolutionary biology.
- **Atavism**: This refers to the reappearance of a trait that had disappeared in previous generations. In this case, the tail in a newborn could be seen as a reversion to an ancestral trait.
- **Vestigial Organs**: These are remnants of organs or structures that had a function in earlier ancestors but no longer serve a significant purpose in the current organism.
- **Homology**: This refers to structures that have a similar origin but may serve different functions in different species.
- **Analogy**: This refers to structures that serve similar functions but have different origins.

3. **Identifying the Correct Answer**:
- The presence of a tail in a newborn baby is best described by the term **atavism**. This is because it represents a trait that was present in human ancestors but has largely disappeared in modern humans. The tail is a remnant of our evolutionary past.

4. **Conclusion**:
- Therefore, the correct answer to the question is **atavism**.