In two-kingdom classification, Euglena was included amongst

Options

A. Animalia
B. Plantae
C. Both A and B
D. Protista.

Answer

### Step-by-Step Solution:

1. **Understanding Two-Kingdom Classification**: The two-kingdom classification system was proposed by Carl Linnaeus in the 18th century. It divides all living organisms into two main kingdoms: Animalia (animals) and Plantae (plants).

2. **Characteristics of Kingdoms**:
- **Kingdom Animalia**: Comprises heterotrophic organisms that do not perform photosynthesis and typically lack cell walls.
- **Kingdom Plantae**: Comprises autotrophic organisms that perform photosynthesis and usually have a cell wall made of cellulose.

3. **Identifying Euglena**: Euglena is a unicellular organism that exhibits characteristics of both plants and animals. It is:
- **Unicellular**: Consists of a single cell.
- **Eukaryotic**: Has a defined nucleus.
- **Photosynthetic**: Can perform photosynthesis, which is a characteristic of plants.
- **Autotrophic**: Can produce its own food through photosynthesis.

4. **Key Distinction**: Despite having photosynthetic capabilities, Euglena does not have a cell wall, which is a typical feature of plant cells. This absence of a cell wall is significant in classification.

5. **Conclusion**: In the context of two-kingdom classification, Euglena is included in the kingdom Plantae because it shares more characteristics with plants than with animals, despite lacking a cell wall.

### Final Answer:
Euglena was included amongst the **kingdom Plantae** in the two-kingdom classification.

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