Choose the correct statement

Options

A. Members of phycomycetes are facultative parasites on plants
B. Fusion of protoplasms between two motile or nonmotile gametes is called plasmogamy
C. Kingdom plantae includes all eukaryotic chlorophyll containing organisms and non-chlorophyllous organisms called plants
D. Trichoderma belongo to basidiomycetes

Answer

To solve the question "Choose the correct statement," we need to evaluate each of the provided options one by one.

### Step-by-Step Solution:

1. **Evaluate Option A**:
- The statement claims that members of Phycomycetes are facultative parasites on plants.
- **Analysis**: Phycomycetes (now often referred to as Zygomycetes) can be parasitic, but they are not typically classified as facultative parasites. They can be obligate parasites, meaning they rely on their host for survival.
- **Conclusion**: This statement is incorrect.

2. **Evaluate Option B**:
- The statement claims that the fusion of protoplasm between two motile and non-motile gametes is known as plasmogamy.
- **Analysis**: Plasmogamy is indeed the process where the cytoplasm of two gametes fuses, which can involve either motile (flagellated) or non-motile gametes. Importantly, during plasmogamy, the nuclei do not fuse; this is a key characteristic of this stage in fungal reproduction.
- **Conclusion**: This statement is correct.

3. **Evaluate Option C**:
- The statement claims that kingdom Plantae includes all eukaryotic chlorophyll-containing organisms and non-chlorophyll-less organisms are called plants.
- **Analysis**: This statement is misleading. Kingdom Plantae primarily includes organisms that contain chlorophyll (like green plants), but non-chlorophyll organisms (like fungi) are not classified under Plantae.
- **Conclusion**: This statement is incorrect.

4. **Evaluate Option D**:
- The statement claims that Trichoderma belongs to the Basidiomycetes.
- **Analysis**: Trichoderma is actually classified under the Ascomycetes, not Basidiomycetes.
- **Conclusion**: This statement is incorrect.

### Final Conclusion:
- The only correct statement among the options is **Option B**: "The fusion of protoplasm between two motile and non-motile gametes is known as plasmogamy."

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