Life cycle of seed plants is

Options

A. Haplontic
B. Haplo-diplontic
C. Diplontic
D. Diplo-haplontic

Answer

### Step-by-Step Solution:

1. **Understanding Life Cycle Patterns**:
- The life cycles of plants can be categorized into different patterns: haplontic, haplodiplontic, diplontic, and diplohaplontic. Each pattern describes the dominance of either the haploid (n) or diploid (2n) stages in the life cycle.

2. **Identifying Seed Plants**:
- Seed plants include Gymnosperms (which produce naked seeds) and Angiosperms (flowering plants that produce seeds within fruits).

3. **Recognizing the Life Cycle of Seed Plants**:
- Seed plants predominantly follow a **Diplontic Life Cycle**. In this cycle, the multicellular body is primarily the sporophyte, which is diploid (2n).

4. **Meiosis in Sporophyte**:
- In the diplontic life cycle, the sporophyte undergoes meiosis to produce haploid spores. These spores develop into gametophytes.

5. **Formation of Gametes**:
- The gametophytes produce gametes through a process called gametogenesis.

6. **Fertilization**:
- The fusion of male and female gametes occurs, resulting in the formation of a diploid zygote.

7. **Development of New Sporophyte**:
- The zygote then develops into a new sporophyte, completing the cycle.

8. **Conclusion**:
- Therefore, the life cycle of seed plants is classified as **Diplontic**.

### Final Answer:
The life cycle of seed plants is **Diplontic**.

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