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 regarding the incorrect statement about plant life cycles and alternation of generations, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Alternation of Generations**:
- In plants, there is a life cycle that alternates between two generations: the haploid gametophyte and the diploid sporophyte. The gametophyte produces gametes, while the sporophyte produces spores.

2. **Analyze Each Statement**:
- **Statement 1**: "In plants, both haploid and diploid cells can divide by mitosis."
- This statement is **true**. Both haploid (N) and diploid (2N) cells can undergo mitosis.

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

- **Statement 3**: "Zygote divides by mitosis to produce a diploid sporophytic plant body."
- This statement is **true**. The zygote (diploid) undergoes mitosis to develop into the sporophyte.

- **Statement 4**: "Alternation of generation occurs between spore-producing haploid gametophyte and gamete-producing diploid sporophyte."
- This statement is **incorrect**. The haploid gametophyte produces gametes, while the diploid sporophyte produces spores. Thus, this statement misrepresents the roles of the gametophyte and sporophyte.

3. **Conclusion**:
- The incorrect statement among the options provided is **Statement 4**.

### Final Answer:
The incorrect statement is: **"Alternation of generation occurs between spore-producing haploid gametophyte and gamete-producing diploid sporophyte."**

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