Choose the correct statement(s) -

Options

A. Living steady state has a self regulatory mechanism called homeostasis
B. Energy flow and energy transformation of living system follow law of thermodynamics
C. Metabolism is release and gain of energy
D. All

Answer

To solve the question "Choose the correct statement(s)", we will analyze the statements provided in the video transcript step by step.

### Step 1: Understand Homeostasis
- **Statement**: "Living organisms have a self-regulatory mechanism called homeostasis."
- **Explanation**: Homeostasis refers to the ability of living organisms to maintain a stable internal environment despite changes in external conditions. This is indeed a correct statement.

### Step 2: Understand the Law of Thermodynamics
- **Statement**: "Energy flow and energy transformation of living systems follow the law of thermodynamics."
- **Explanation**: The law of thermodynamics governs the principles of energy transfer and transformation in biological systems. This statement is also correct.

### Step 3: Understand Metabolism
- **Statement**: "Metabolism is the release and gain of energy; metabolism is catabolic and anabolic."
- **Explanation**: Metabolism encompasses all chemical reactions in a living organism, including catabolic reactions (which release energy by breaking down molecules) and anabolic reactions (which consume energy to build up molecules). This statement is correct as well.

### Conclusion
All the statements presented in the question are correct. Therefore, the answer to the question is that all statements are valid.

### Summary of Correct Statements:
1. Living organisms have a self-regulatory mechanism called homeostasis.
2. Energy flow and energy transformation of living systems follow the law of thermodynamics.
3. Metabolism involves both the release and gain of energy, encompassing catabolic and anabolic processes.

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