Which one is incorrect

Options

A. New individuals replace the dead ones
B. Homeostasis produces a self regulated stead state
C. Most homeostatic mechanism operate through feed-back system
D. Cell obtains instructions for division from a hereditary protein.

Answer

To determine which statement is incorrect, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Analyze Option A**:
- Statement: "New individuals replace the dead ones."
- Explanation: This statement is generally true in biological terms. In many species, new individuals (offspring) are born and can replace those that have died, contributing to the continuity of the species. Therefore, this option is correct.

2. **Analyze Option B**:
- Statement: "Homeostasis produces a self-regulated state."
- Explanation: Homeostasis refers to the ability of an organism to maintain a stable internal environment despite external changes. This statement is accurate as homeostasis indeed results in a self-regulated state within organisms. Hence, this option is also correct.

3. **Analyze Option C**:
- Statement: "Most homeostasis mechanisms operate through feedback systems."
- Explanation: This statement is correct. Homeostatic mechanisms often utilize feedback systems, primarily negative feedback, to maintain equilibrium within the body. Therefore, this option is correct as well.

4. **Analyze Option D**:
- Statement: "Cell obtains instruction for division from a hereditary protein."
- Explanation: This statement is incorrect. While hereditary factors influence traits, the actual instructions for cell division are contained within the cell's nucleus, specifically in the DNA. The cell does not obtain division instructions from a hereditary protein; rather, it is regulated by the genetic material in the nucleus. Thus, this option is incorrect.

### Conclusion:
The incorrect statement is **Option D**: "Cell obtains instruction for division from a hereditary protein."

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