Select incorrect statement regarding microporogenesis in an anther

Options

A. large number of microspore mother cells differentiate in one pollen sac
B. each microsporogenesis involves one meiosis and two mitosis
C. microspore tetrads may be tetrahedral or isobilateral
D. it consumes tapetum and middle layer

Answer

### Step-by-Step Solution:

1. **Understanding Microsporogenesis**: Microsporogenesis is the process of forming microspores from microspore mother cells in the anther of flowering plants. Microspores develop into pollen grains, which are the male gametes.

2. **Identifying the Structure**: The anther is the male reproductive part of the flower, located at the top of the stamen. It contains microsporangia (pollen sacs) where microsporogenesis occurs.

3. **Evaluating the Statements**:
- **Statement 1**: "Large number of microspore mother cells differentiated in one pollen sac."
- This statement is **correct**. In each microsporangium, many microspore mother cells (microsporocytes) are formed.

- **Statement 2**: "Each microsporogenesis involved one meiosis and two mitosis."
- This statement is **incorrect**. Microsporogenesis involves one meiotic division to produce four microspores, and typically, there is no requirement for two mitotic divisions at this stage.

- **Statement 3**: "Microspore tetrad may be tetrahedral and isobilateral."
- This statement is **correct**. After meiosis, the microspores can form tetrads that can be arranged in different geometric configurations, such as tetrahedral or isobilateral.

- **Statement 4**: "It consumes tapetum and middle layer."
- This statement is **correct**. The tapetum, which is the innermost layer of the anther, provides nourishment to the developing pollen grains, and the middle layer also plays a role in this process.

4. **Conclusion**: The incorrect statement regarding microsporogenesis in an anther is **Statement 2**: "Each microsporogenesis involved one meiosis and two mitosis."

### Final Answer:
The incorrect statement regarding microsporogenesis in an anther is: **"Each microsporogenesis involved one meiosis and two mitosis."**

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