Selaginella bears two types of spores and Dryopteris (fern ) bears on one type of spores in pteridophytes .

Explanation

### Step-by-Step Solution:

1. **Understanding Selaginella**:
- Selaginella is a type of pteridophyte that produces two distinct types of spores: microspores (male spores) and megaspores (female spores). This characteristic is known as heterospory.
- Heterospory allows for sexual reproduction and the development of different gametes, which can lead to greater genetic diversity.

2. **Understanding Dryopteris**:
- Dryopteris, commonly known as ferns, produces only one type of spore, which is called homospore. This means that the spores produced are all of the same type and can develop into gametophytes that produce both male and female gametes.
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