The eukaryotic , multicellular , saprophytic organisms reproduce sexually by

Options

A. Zygospores , ascospores, basidiospores
B. Zoospores, ascospores, basidiospores
C. Sporangiospores and conidia
D. Zygospores zoospores, basidiospores

Answer

To solve the question regarding how eukaryotic, multicellular, saprophytic organisms reproduce sexually, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Identify the Organism Type**:
- The question specifies "eukaryotic, multicellular, saprophytic organisms." This description fits fungi, which are known to be eukaryotic and saprophytic.

2. **Understand Fungi's Nutrition**:
- Fungi are heterotrophic organisms that absorb soluble organic matter from dead substrates, which classifies them as saprophytes.

3. **Reproduction in Fungi**:
- Fungi can reproduce in three ways: vegetatively, asexually, and sexually. The focus here is on sexual reproduction.

4. **Identify Sexual Spores**:
- The sexual reproduction in fungi involves the formation of sexual spores. The main types of sexual spores in fungi are:
- **Zygospores**: These are formed in the life cycle of many fungi and protists, representing a diploid stage.
- **Ascospores**: These are produced in sac-like structures called asci.
- **Basidiospores**: These are produced on club-shaped structures called basidia.

5. **Analyze the Options**:
- The options provided in the question include various types of spores:
- Zygospores, ascospores, and basidiospores
- Zoospores, ascospores, and basidiospores
- Sporangiospores and conidia
- Zygospores, zoospores, and basidiospores

6. **Eliminate Incorrect Options**:
- Zoospores and sporangiospores are asexual spores, so options containing these can be eliminated.
- The first option includes zygospores, ascospores, and basidiospores, which are all sexual spores.

7. **Conclusion**:
- Therefore, the correct answer is the first option: **Zygospores, ascospores, and basidiospores**.

### Final Answer:
The eukaryotic, multicellular, saprophytic organisms reproduce sexually by **zygospores, ascospores, and basidiospores**.