[A]: Trichomes may occur on all parts of a plant.
[R]: Trichomes either persist throughout the life of an organ or are ephemeral

Options

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

Answer

To solve the question regarding the assertion and reason about trichomes, we can follow these steps:

### Step 1: Understand the Assertion
The assertion states that "Trichomes may occur on all parts of a plant."
- Trichomes are hair-like structures found on the surface of various plant organs, including leaves, stems, and roots. They serve various functions such as protection, reducing water loss, and aiding in photosynthesis.

### Step 2: Understand the Reason
The reason states that "Trichomes either persist throughout the life of an organ or are ephemeral."
- This means that trichomes can either remain on the plant for its entire life or may only be present for a short period before they fall off or die.

### Step 3: Analyze the Truth of the Statements
- Both the assertion (A) and the reason (R) are true statements. Trichomes do occur on all parts of the plant, and they can be either persistent or ephemeral.

### Step 4: Determine the Relationship Between A and R
- Although both statements are true, the reason (R) does not provide a direct explanation for the assertion (A). The fact that trichomes can occur on all parts of the plant does not depend on whether they are persistent or ephemeral.

### Step 5: Conclusion
Based on the analysis:
- Both A and R are true, but R is not the correct explanation of A. Thus, the correct answer is that both A and R are true, but R is not the correct explanation of A.

### Final Answer
Both A and R are true, but R is not the correct explanation of A.

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