Which of the following pair of evidences indicates the common ancestry ?

Options

A. Homologous organs&analogous organs
B. Homologous organs & vestigeal organs
C. Analogous organs & vestigeal organs
D. Both (A) and (C)

Answer

To solve the question "Which of the following pair of evidences indicates the common ancestry?", we will analyze the terms provided in the options and their implications regarding common ancestry.

### Step-by-Step Solution:

1. **Understanding Homologous Organs**:
- Homologous organs are those that have a similar structure and anatomical features but perform different functions.
- Example: The forelimbs of humans, whales, and bats are structurally similar but serve different purposes (manipulation, swimming, and flying, respectively).
- **Conclusion**: Homologous organs indicate common ancestry.

2. **Understanding Analogous Organs**:
- Analogous organs are those that perform similar functions but have different structural features and origins.
- Example: The wings of birds and insects serve the same function (flying) but are structurally different.
- **Conclusion**: Analogous organs do not indicate common ancestry, as they arise from different evolutionary paths.

3. **Understanding Vestigial Organs**:
- Vestigial organs are remnants of organs that were functional in ancestral species but have lost their original function over time.
- Example: The human appendix is a vestigial organ that was once part of a digestive system in ancestral species.
- **Conclusion**: Vestigial organs also indicate common ancestry as they reflect the evolutionary history of an organism.

4. **Evaluating the Options**:
- Given the definitions:
- Homologous organs indicate common ancestry.
- Vestigial organs indicate common ancestry.
- Analogous organs do not indicate common ancestry.
- Therefore, the pairs that indicate common ancestry are:
- Homologous organs and vestigial organs.

5. **Final Answer**:
- The correct option is the pair of homologous organs and vestigial organs.