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Write the intrinsic and extrinsic growth...

Write the intrinsic and extrinsic growth factors.

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### Step-by-Step Solution **Step 1: Define Intrinsic Growth Factors** Intrinsic growth factors are internal factors that influence the growth of an organism. They are primarily related to the organism's internal biological processes. **Step 2: Identify Examples of Intrinsic Growth Factors** 1. **Enzymes**: These are biological catalysts that speed up chemical reactions in the body, facilitating growth and development. 2. **Hormones**: These are signaling molecules that regulate various physiological processes. In plants, important growth hormones include: - **Auxins**: Promote root and shoot growth. - **Gibberellins**: Aid in seed germination and stem elongation. - **Cytokinins**: Stimulate cell division and growth. - **Florigen**: Promotes flowering. **Step 3: Define Extrinsic Growth Factors** Extrinsic growth factors are external factors that affect the growth of an organism. These factors are influenced by the environment and external conditions. **Step 4: Identify Examples of Extrinsic Growth Factors** 1. **Light Availability**: The amount and quality of light can significantly affect plant growth and development. 2. **Temperature**: Optimal temperature ranges are crucial for metabolic processes and overall growth. 3. **Water Availability**: Water is essential for photosynthesis and nutrient transport in plants. 4. **Climatic Conditions**: Weather patterns and seasonal changes can impact growth rates and development stages. ### Summary - **Intrinsic Growth Factors**: Enzymes, hormones (Auxins, Gibberellins, Cytokinins, Florigen). - **Extrinsic Growth Factors**: Light, temperature, water availability, climatic conditions. ---
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