Development in plants is influenced by both intrinsic and extrinsic factors. Which of the following is included under interinsic factors?

Options

A. Growth regulators
B. Oxygen
C. Water
D. All of these

Answer

To determine which of the given options is included under intrinsic factors that influence plant development, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Intrinsic Factors**: These are internal factors that influence plant growth and development. They are primarily genetic and hormonal in nature.
- **Extrinsic Factors**: These are external environmental factors that affect plant growth, such as light, water, and nutrients.

2. **Identify the Sequence of Plant Development**:
- Plant development includes several stages: seed germination, differentiation, maturation, flowering, seed formation, and senescence.

3. **Recognize the Role of Intrinsic Factors**:
- Intrinsic factors control the internal processes of the plant, including the genetic makeup and hormonal signals that regulate growth.

4. **List Common Intrinsic Factors**:
- Genetic factors (DNA, genes)
- Hormonal factors (plant hormones like auxins, gibberellins, cytokinins)
- Growth regulators (substances that influence growth)

5. **Analyze the Options Given**:
- Review the options provided in the question to identify which one falls under intrinsic factors.

6. **Select the Correct Option**:
- If one of the options is "growth regulators," then this is the correct answer as it is an intrinsic factor. Other options like oxygen and water would be considered extrinsic factors.

### Conclusion:
The correct answer is **growth regulators**, as they are classified as intrinsic factors that influence the development of plants.

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