Heterospory is production of

Options

A. diploid and tetraploid spores
B. sexual and asexual spores
C. large and small spores
D. haploid and diploid spores

Answer

### Step-by-Step Solution:

1. **Understanding Heterospory**: Heterospory refers to the production of two distinct types of spores in certain plants. This is a key concept in plant biology, particularly in the study of reproductive strategies.

2. **Types of Spores**: In heterosporous plants, the two types of spores produced are:
- **Microspores**: These are the smaller spores that typically develop into male gametophytes.
- **Megaspores**: These are the larger spores that develop into female gametophytes.

3. **Examples of Heterosporous Plants**: Common examples of heterosporous plants include:
- Certain **Pteridophytes** (e.g., Selaginella and Salvinia)
- **Gymnosperms** (e.g., conifers)

4. **Conclusion**: Based on the definitions and examples, heterospory specifically refers to the production of large and small spores, which correspond to megaspores and microspores, respectively.

5. **Final Answer**: Therefore, the correct answer to the question "Heterospory is the production of" is **large and small spores**.