A: Growth of male gametophyte is completed over the female reproductive organ
R: 2- celled stage of partial male gametophyte is developed in situ

Options

A. if both assetion A reason are ture and the reason is the correct explanation of the assertion then mark
B. if both assertion & reason are ture and the reason is not the correct explanation of the assertin then mark
C. if assertion is true statement but reason is false then mark
D. if both assertion and reason are flase statements then mark

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Assertion (A)**: The assertion states that the growth of the male gametophyte is completed over the female reproductive organ. This is true because the male gametophyte, which is represented by the pollen grain, germinates on the stigma of the flower, which is part of the female reproductive structure.

2. **Understanding the Reason (R)**: The reason provided states that the two-celled stage of the partial male gametophyte is developed in situ. This refers to the fact that when the pollen grain lands on the stigma, it undergoes a process of germination where it develops into a pollen tube and forms two male gametes (sperm cells) while still attached to the stigma.

3. **Analyzing the Relationship**: Both the assertion and the reason are true. The male gametophyte does grow and develop on the female reproductive organ, and the two-celled stage indeed develops in situ. However, the reason does not fully explain the assertion. The assertion is about the location of growth, while the reason describes a specific developmental stage.

4. **Conclusion**: Since both the assertion and the reason are true, but the reason does not adequately explain the assertion, the correct answer is that both statements are true, but the reason is not the correct explanation for the assertion.

**Final Answer**: Both the assertion and the reason are true, but the reason is not the correct explanation for the assertion.

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