Which of the following statements is right ?

Options

A. Fronds are found in bryophytes.
B. Multiciliate sperms are found in angiosperms.
C. Diatoms produce basidiospores.
D. Heterocysts are found in Nostoc.

Answer

To determine which of the statements is correct, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1: Fawns are found in Bryophytes.**
- **Analysis:** This statement is incorrect. Bryophytes are non-vascular plants that include mosses and liverworts. They do not have structures called "fawns." The term "fawn" is not typically associated with any plant structures.
- **Conclusion:** This statement is wrong.

2. **Statement 2: Multicellular spores are found in angiosperms.**
- **Analysis:** This statement is also incorrect. Angiosperms (flowering plants) produce pollen grains as male gametes, which are unicellular. Spores in angiosperms are not multicellular; they are typically unicellular.
- **Conclusion:** This statement is wrong.

3. **Statement 3: Diatoms produce basidiospores.**
- **Analysis:** This statement is incorrect. Diatoms are a group of algae known for their silica cell walls, and they do not produce basidiospores. Basidiospores are produced by fungi in the class Basidiomycetes.
- **Conclusion:** This statement is wrong.

4. **Statement 4: Heterocysts are found in Nostoc.**
- **Analysis:** This statement is correct. Nostoc is a genus of cyanobacteria (blue-green algae) that contains specialized cells called heterocysts. Heterocysts are involved in nitrogen fixation, allowing the organism to convert atmospheric nitrogen into a usable form.
- **Conclusion:** This statement is right.

### Final Answer:
The correct statement is: **Heterocysts are found in Nostoc.**

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