If Darwin's theory of pangenesis shows similarity with theory of inheritance of acquired character then what shall be correct according to it

Options

A. Useful organs becomes trong and developed while useless organs become extinct
B. Size of organs increase with ageing
C. Development of organs is due to will power
D. There should be some physical basis of inheritance.

Answer

To answer the question regarding the similarity between Darwin's theory of pangenesis and the theory of inheritance of acquired characters, we can break down the concepts step by step.

### Step-by-Step Solution:

1. **Understanding Darwin's Theory of Pangenesis**:
- Darwin proposed the theory of pangenesis, which suggests that all parts of the body produce tiny particles called "gemmules" that carry information about the characteristics of the organism. These gemmules are thought to be passed on to the offspring.

**Hint**: Remember that pangenesis involves the idea that all body parts contribute to inheritance.

2. **Understanding the Theory of Inheritance of Acquired Characters**:
- This theory, proposed by Lamarck, states that traits acquired or modified during an organism's lifetime can be passed on to its offspring. For example, if an organism develops a stronger muscle due to use, that trait can be inherited by its descendants.

**Hint**: Focus on the concept that acquired traits during an individual's life can be inherited.

3. **Identifying Similarities**:
- Both theories suggest that characteristics acquired during an organism's life can be transmitted to the next generation. In pangenesis, the gemmules carry the information of these acquired traits, while in Lamarck's theory, the acquired traits themselves are inherited.

**Hint**: Look for the common theme of inheritance of traits acquired during an organism's lifetime.

4. **Conclusion**:
- Given that both theories emphasize the inheritance of acquired characteristics, the correct conclusion is that there should be some physical basis of inheritance. This aligns with the idea that traits developed or modified in an individual can be passed down through generations.

**Hint**: Think about how both theories connect to the idea of a physical mechanism for passing on traits.

### Final Answer:
The correct statement according to the similarity between Darwin's theory of pangenesis and the theory of inheritance of acquired characters is: "There should be some physical basis of inheritance."