A plant growing in complete darkness shows

Options

A. Vernalisation
B. Etiolation
C. Chlorosis
D. Wilting.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks what a plant growing in complete darkness shows. This implies we need to identify the physiological or morphological changes that occur in such conditions.

2. **Analyzing the Options**:
- **Option 1: Vernalization**: Vernalization refers to the process of exposing plants to a prolonged period of cold temperatures to induce flowering. Since this process involves cold temperatures and not darkness, this option is incorrect.

- **Option 2: Etiolation**: Etiolation is a phenomenon observed in plants that grow in the absence of light. In this condition, plants exhibit elongated stems, pale yellowish leaves, and a lack of chlorophyll. This adaptation helps them reach for light. Therefore, this option is likely correct.

- **Option 3: Chlorosis**: Chlorosis is the yellowing of normally green leaves due to a deficiency in chlorophyll. While chlorosis can occur due to various stress factors, it is not specifically indicative of a plant growing in complete darkness. Thus, this option is not the best answer.

- **Option 4: Wilting**: Wilting refers to the loss of rigidity in non-woody parts of the plant, often due to water loss. This does not directly relate to the condition of growing in darkness, making this option incorrect.

3. **Conclusion**: After analyzing all the options, the best answer is **Etiolation**, as it specifically describes the adaptations of plants growing in complete darkness.

**Final Answer**: The correct answer is **Etiolation**.

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