Which is true ?

Options

A. Etiolation is genetic while albinism is physiological
B. Etiolation is not reversible
C. Etiolation is physiological but albinism is genetic
D. Etiolation and albinism are synonyms

Answer

To determine which statement is true regarding etiolation and albinism, we need to analyze each option provided. Here’s a step-by-step breakdown:

### Step 1: Understand the Terms
- **Etiolation**: This is a physiological process that occurs in plants when they grow in partial or complete absence of light. It leads to elongated stems and pale leaves as the plant stretches towards the light.
- **Albinism**: This is a genetic condition characterized by little or no production of the pigment melanin in individuals, which can occur in various organisms, including humans.

### Step 2: Analyze Each Statement
1. **"Etiolation is genetic while albinism is physiological."**
- This is incorrect. Etiolation is a physiological response, and albinism is a genetic condition.

2. **"Etiolation is not reversible."**
- This is incorrect. While etiolation can lead to permanent changes in the plant's structure, it can be reversed if the plant is exposed to light.

3. **"Etiolation is physiological but albinism is genetic."**
- This statement is true. Etiolation is indeed a physiological process, and albinism is a genetic condition.

4. **"Etiolation and albinism are synonyms."**
- This is incorrect. They are not synonyms; they refer to different processes in different organisms.

### Step 3: Conclusion
Based on the analysis, the true statement is: **"Etiolation is physiological but albinism is genetic."**