Which one of the following is a partial heterotroph

Options

A. Rafflesia
B. Eucalyptus
C. Drosera
D. Hydrilla

Answer

To determine which of the following organisms is a partial heterotroph, we need to analyze the characteristics of each option provided: Rafflesia, Eucalyptus, Drosera, and Hydrilla.

### Step-by-Step Solution:

1. **Understanding Heterotrophs**:
- Heterotrophs are organisms that cannot produce their own food and must obtain nutrients from other sources, typically by consuming other organisms. Partial heterotrophs are those that can perform photosynthesis but also derive some nutrients from other sources.

2. **Analyzing Each Option**:
- **Rafflesia**:
- Rafflesia is a parasitic flowering plant that does not perform photosynthesis. It derives all its nutrients from its host plant. Therefore, it is not a partial heterotroph.

- **Eucalyptus**:
- Eucalyptus is a tree that primarily photosynthesizes to produce its own food. It does not obtain nutrients from other organisms, so it is not classified as a partial heterotroph.

- **Drosera**:
- Drosera, also known as sundew, is an insectivorous plant that has chlorophyll and can perform photosynthesis. However, it also captures and digests insects to obtain nitrogen and other nutrients. This dual mode of nutrition makes it a partial heterotroph.

- **Hydrilla**:
- Hydrilla is an aquatic plant that primarily photosynthesizes and does not derive nutrients from other organisms. Thus, it is not a partial heterotroph.

3. **Conclusion**:
- After analyzing all the options, the only organism that qualifies as a partial heterotroph is **Drosera**.

### Final Answer:
The correct answer is **Drosera**.