Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?

Options

A. Yeast used in making bread and beer is a fungus
B. Nostoc and Anabaena are examples of protista
C. Paramecium and Plasmodium belong to the same kingdom as that of Penicillium
D. Lichen is a composite organism formed from the symbiotic association of an alage and a protozoan

Answer

To determine which organism or pair of organisms is correctly assigned to its or their named taxonomic group, we will analyze each statement provided in the question.

### Step-by-Step Solution:

1. **Examine the first statement**: "Yeast used in making bread and beer is a fungus."
- **Analysis**: Yeast is indeed a type of fungus. It is commonly used in baking and brewing processes. Therefore, this statement is **true**.

2. **Examine the second statement**: "Nostoc and Anabina are examples of Protista."
- **Analysis**: Nostoc and Anabina are not classified under Protista; they are cyanobacteria, which belong to the kingdom Monera. Thus, this statement is **false**.

3. **Examine the third statement**: "Paramecium and Plasmodium belong to the same kingdom as that of penicillin."
- **Analysis**: Penicillium is a fungus and belongs to the kingdom Fungi. In contrast, Paramecium and Plasmodium belong to the kingdom Protista. Therefore, this statement is also **false**.

4. **Examine the fourth statement**: "Lichen is a composite organism formed from the symbiotic association of an algae and protozoan."
- **Analysis**: Lichens are actually formed from the symbiotic relationship between algae and fungi, not protozoans. Hence, this statement is **false**.

### Conclusion:
After analyzing all the statements, the only correct statement is the first one: "Yeast used in making bread and beer is a fungus." Therefore, the correct answer is that yeast is correctly assigned to its taxonomic group.