Select the incorrect statement.

Options

A. Typical angiospermic anther is tetrasporngiate.
B. Usually one microspore mother cell gives rise to one functional microspore.
C. Tapetal cells have two or more nuclei.
D. Sporopollenin in exine is one of the most resistant material.

Answer

To solve the question, "Select the incorrect statement," we will analyze each of the provided options step by step.

### Step 1: Analyze Option 1
**Statement:** A typical angiospermic anther is tetrasporangiate.

- **Explanation:** The male reproductive organ of angiosperms is the stamen, which consists of the filament and the anther. The anther is typically bilobed and contains four locules, each containing microsporangia. Since there are four microsporangia, it is referred to as tetrasporangiate.
- **Conclusion:** This statement is **correct**.

### Step 2: Analyze Option 2
**Statement:** Usually, one microspore mother cell gives rise to one functional microspore.

- **Explanation:** In angiosperms, a microspore mother cell (microsporocyte) undergoes meiosis to produce four haploid microspores. Therefore, one microspore mother cell does not give rise to just one microspore; it gives rise to four microspores.
- **Conclusion:** This statement is **incorrect**.

### Step 3: Analyze Option 3
**Statement:** Tapetous cells have 2 or more nuclei.

- **Explanation:** Tapetal cells, which are part of the anther, often exhibit polyploidy, meaning they can have more than one nucleus. This is due to the fusion of uninucleate cells, resulting in cells with multiple nuclei.
- **Conclusion:** This statement is **correct**.

### Step 4: Analyze Option 4
**Statement:** Sporopollenin in exine is one of the most resistant materials.

- **Explanation:** Sporopollenin is indeed a major component of the exine (outer layer) of pollen grains and spores. It is known for its chemical stability and resistance to degradation, making it one of the most durable biological materials.
- **Conclusion:** This statement is **correct**.

### Final Answer
After analyzing all the options, the **incorrect statement** is: "Usually, one microspore mother cell gives rise to one functional microspore."

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