_________includes all the changes that an organism undergoes during its life cycle, from seed germination to senescence.

Options

A. Growth
B. Differntitation
C. Dedifferentitation
D. Development

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a term that encompasses all the changes an organism undergoes throughout its life cycle, specifically from seed germination to senescence.

2. **Identifying Key Terms**: The key terms in the question are "changes," "organism," "life cycle," "seed germination," and "senescence." These terms indicate a process that includes growth and development phases.

3. **Evaluating Options**: The options provided are:
- A) Growth
- B) Differentiation
- C) De-differentiation
- D) Development

4. **Analyzing Each Option**:
- **Growth**: Refers to an increase in size or mass but does not encompass all life cycle changes.
- **Differentiation**: Involves the process where cells become specialized but does not cover the entire life cycle.
- **De-differentiation**: Refers to the process where specialized cells revert to a less specialized state, which is not a complete life cycle process.
- **Development**: This term includes all changes from seed germination through growth, flowering, fruiting, and ultimately to senescence.

5. **Conclusion**: The term that best fits the description of all changes an organism undergoes during its life cycle, from seed germination to senescence, is **Development**.

6. **Final Answer**: The correct answer is **Development** (Option D).

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