Select an incorrect statement for plant life cycle and alternation of generations

Options

A. In plants, both haploid and diploid cells can divide by mitosis
B. The haploid plant body produces gametes by mitosis.
C. Zygote divides by mitosis to produce a diploid sporophytic plant body
D. Alternation of generations occurs between spore producing haploid gametophyte and gamete producing diploid sporophyte

Answer

To solve the question of selecting an incorrect statement regarding the plant life cycle and alternation of generations, we will analyze the statements provided and identify the one that does not align with the established biological principles.

### Step-by-Step Solution:

1. **Understanding Alternation of Generations**:
- The alternation of generations in plants refers to the life cycle that alternates between two distinct forms: the haploid gametophyte and the diploid sporophyte.

2. **Identifying the Plant Body Types**:
- The **gametophyte** is the haploid phase that produces gametes (sperm and eggs) through mitosis.
- The **sporophyte** is the diploid phase that develops from the fertilization of gametes (forming a zygote) and produces spores through meiosis.

3. **Analyzing Each Statement**:
- **Statement 1**: "In plants, both haploid and diploid cells can divide by mitosis."
- This statement is true. Both gametophytes (haploid) and sporophytes (diploid) can undergo mitosis.

- **Statement 2**: "Haploid plant body produces gametes by mitosis."
- This statement is also true. The gametophyte produces gametes through mitosis.

- **Statement 3**: "Zygote divides by mitosis to form a diploid sporophytic plant body."
- This statement is true. The zygote, which is diploid, divides by mitosis to develop into the sporophyte.

- **Statement 4**: "Gamete-producing diploid sporophyte."
- This statement is incorrect. The sporophyte does not produce gametes; instead, it produces spores through meiosis. Gametes are produced by the haploid gametophyte.

4. **Conclusion**:
- The incorrect statement is **Statement 4**: "Gamete-producing diploid sporophyte."

### Final Answer:
The incorrect statement is **Statement 4**: "Gamete-producing diploid sporophyte."

---