A: filiform apparauts guides the pollen tube into the synergids
R: It is special cellular thickening at microplylar tip to secrete chemotorpic stimulus

Options

A. if both assertion A reason are true and the reason is the correct explanation of the assertion then mark
B. if both assertion & reason are true 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 false statements then mark

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion and Reason:**
- The assertion states that the filiform apparatus guides the pollen tube into the synergids.
- The reason states that it is a special cellular thickening at the micropylar tip that secretes a chemotropic stimulus.

2. **Analyzing the Assertion:**
- The filiform apparatus is indeed a structure found in the synergids of the egg apparatus in flowering plants.
- Its primary function is to guide the pollen tube towards the synergids, facilitating fertilization.

3. **Analyzing the Reason:**
- The reason describes the filiform apparatus as a special cellular thickening at the micropylar end of the synergids.
- It also states that this structure secretes a chemotropic stimulus, which attracts the pollen tube to the synergids.

4. **Determining the Truth of Both Statements:**
- Both the assertion and the reason are true:
- The assertion is correct as the filiform apparatus does guide the pollen tube.
- The reason is also correct as it accurately describes the function and location of the filiform apparatus.

5. **Establishing the Relationship Between Assertion and Reason:**
- The reason provides a correct explanation for the assertion, as it describes how the filiform apparatus functions to guide the pollen tube.

6. **Conclusion:**
- Since both the assertion and reason are true, and the reason correctly explains the assertion, the correct answer is that both statements are true and the reason is the correct explanation of the assertion.

**Final Answer:**
Both the assertion and reason are true, and the reason is the correct explanation of the assertion.

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