Theory of continuity of germplasm was propounded by

Options

A. Mendel
B. Lamarck
C. Weismann
D. Haeckel

Explanation

To solve the question "Theory of continuity of germplasm was propounded by," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the scientist who proposed the theory of continuity of germplasm.

2. **Identify the Options**: The options provided are Mendel, Lamarck, Weizmann, and Hecker.

3. **Review Each Option**:
- **Mendel**: Known as the father of genetics, he formulated the laws of inheritance (law of dominance, law of independent assortment, and law of segregation). He did not propose the theory of continuity of germplasm.
- **Lamarck**: Proposed the theory of inheritance of acquired characteristics, often referred to as the theory of use and disuse. This theory is not related to the continuity of germplasm.
- **Weizmann**: Proposed the theory of continuity of germplasm, which distinguishes between somatoplasm (body cells) and germplasm (reproductive cells). Changes in somatic cells do not affect the next generation, while changes in germ cells do.
- **Hecker**: Known for the biogenetic law, which states that ontogeny repeats phylogeny. He did not propose the theory of continuity of germplasm.

4. **Select the Correct Answer**: Based on the analysis, the correct answer is **Weizmann**.

5. **Conclusion**: The theory of continuity of germplasm was propounded by Weizmann.

### Final Answer:
**Weizmann**

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