Assertion: Funaria archegonium has maximum concentration of sucrose at the tip of neck.
Reason: Male gametes show chemotropic movement.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B. If both Assertion and Reason are true, but the Reason is not the correct explanation of the Assertion.
C. If Assertion is true, but Reason is false.
D. If both Assertion and Reason are false.

Answer

To solve the question, we need to analyze the assertion and the reason provided:

### Step 1: Understand the Assertion
The assertion states that "Funaria archegonium has maximum concentration of sucrose at the tip of the neck."
- **Explanation**: The archegonium of Funaria (a type of moss) consists of three parts: the venter, the neck, and the stalk. The neck is made up of several cells arranged in vertical rows. When the archegonium matures, the venter canal cells and neck canal cells degenerate, creating a passage for sperm to enter. During this process, a mucilaginous mass is formed that absorbs water and releases sucrose, leading to a higher concentration of sucrose at the tip of the neck.

### Step 2: Understand the Reason
The reason states that "Male gametes show chemotropic movement."
- **Explanation**: Chemotropic movement refers to the movement of organisms in response to a chemical stimulus. In this case, the male gametes (sperm) are attracted to the sucrose released by the egg in the archegonium. This attraction is a form of chemotropic movement, as the sperm moves towards the higher concentration of sucrose.

### Step 3: Evaluate the Relationship Between Assertion and Reason
- Both the assertion and the reason are true statements. The assertion correctly describes the concentration of sucrose in the Funaria archegonium, and the reason accurately describes the chemotropic movement of male gametes towards the sucrose.

### Conclusion
Both the assertion and the reason are true, and the reason provides a correct explanation for the assertion. Therefore, the correct answer is that both the assertion and the reason are true, and the reason is the correct explanation of the assertion.

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