Comparative anatomy and morphology shown ...A .. and ...B.. and organisms of today and those that existed years ago. Such similarities can be interested to understand whether ..C.. ancestors were shared or not .
Choose the correct option for A,B and C the complete the given NCERT statement .

Options

A. A -similarities , B - differences , C - common
B. A -similarities , B - differences , C - different
C. A - complexities , B - differences , C - different
D. A - complexities , B - similarities , C - common

Answer

To complete the given NCERT statement, we need to fill in the blanks A, B, and C with appropriate terms based on the context of comparative anatomy and morphology.

### Step-by-Step Solution:

1. **Identify the context**: The question discusses comparative anatomy and morphology, which are fields that study the similarities and differences in the structure and form of organisms.

2. **Fill in A and B**: The statement refers to two aspects of comparative anatomy and morphology. The most logical terms to fit in these blanks are "similarities" for A and "differences" for B. This is because comparative anatomy often involves analyzing both similarities and differences to understand evolutionary relationships.

- **A**: similarities
- **B**: differences

3. **Fill in C**: The statement discusses whether ancestors were shared or not. The context suggests that if organisms show similarities, it implies they may have a common ancestor. Therefore, the appropriate term for C would be "their" to indicate the ancestors of the organisms being compared.

- **C**: their

4. **Final Statement**: Putting it all together, the completed statement reads: "Comparative anatomy and morphology show similarities and differences in organisms of today and those that existed years ago. Such similarities can be interesting to understand whether their ancestors were shared or not."