Select an incorrect statement about gemmae?

Options

A. Gemmae are green, multicellular, sexual buds
B. Gemmae develop in small receptacles called gemma cups located on the thalli.
C. Gemmae become detached from the parent body and germinate to form new individuals
D. Gemmae are biconcave stalked structures

Answer

To determine the incorrect statement about gemmae, let's analyze each option step by step.

### Step 1: Understand what gemmae are
Gemmae are small, multicellular structures found in certain plants, particularly bryophytes. They are involved in asexual reproduction.

### Step 2: Analyze the options
1. **Option 1:** "Gemmae are green, multicellular sexual buds."
- **Analysis:** Gemmae are indeed green and multicellular, but they are asexual, not sexual. Therefore, this statement is incorrect.

2. **Option 2:** "Gemmae develop in small receptacles called gemma cups which are located on the thallus."
- **Analysis:** This statement is correct. Gemmae do develop in gemma cups on the thallus of the plant.

3. **Option 3:** "Gemmae become detached from the parent body and germinate to form new individuals."
- **Analysis:** This statement is also correct. Gemmae detach from the parent plant and can grow into new individuals.

4. **Option 4:** "Gemmae are biconcave stalk structures."
- **Analysis:** This statement is correct as well. Gemmae can have a biconcave shape and may possess stalks.

### Step 3: Conclusion
The only incorrect statement about gemmae is **Option 1**, which claims that gemmae are sexual buds. In reality, they are asexual buds.

### Final Answer
The incorrect statement about gemmae is: **"Gemmae are green multicellular sexual buds."**

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