Find the odd one out with respect to ecto-or endo-parasitism.

Options

A. Cuscuta
B. Hirudinea
C. Anopheles
D. Plasmodium

Answer

To solve the question of finding the odd one out with respect to ecto- or endo-parasitism, we will analyze each option provided and categorize them based on their parasitic nature.

### Step-by-Step Solution:

1. **Understand Ecto- and Endoparasitism**:
- **Ectoparasitism**: Parasites that live on the surface of the host (e.g., fleas, ticks).
- **Endoparasitism**: Parasites that live inside the host's body (e.g., tapeworms, Plasmodium).

2. **Analyze Each Option**:
- **Option 1: Cuscuta**
- Cuscuta, also known as dodder, is a plant that is a parasitic vine. It attaches to the host plant and derives nutrients from it. It is considered an **endoparasite** since it penetrates the host plant.
- **Option 2: Hirudinia**
- Hirudinia refers to leeches, which are ectoparasites. They attach to the outside of their host and feed on their blood. Thus, they are classified as **ectoparasites**.
- **Option 3: Anopheles**
- Anopheles is a genus of mosquitoes. Female Anopheles mosquitoes are vectors for malaria, carrying the Plasmodium parasite. They are considered **ectoparasites** because they feed on the blood of their hosts.
- **Option 4: Plasmodium**
- Plasmodium is a genus of parasites that cause malaria. They live inside the host (human) and are classified as **endoparasites**.

3. **Identify the Odd One Out**:
- From the analysis:
- Cuscuta: Endoparasite
- Hirudinia: Ectoparasite
- Anopheles: Ectoparasite
- Plasmodium: Endoparasite
- The odd one out is **Plasmodium**, as it is the only endoparasite among the options provided.

### Final Answer:
The odd one out with respect to ecto- or endo-parasitism is **Plasmodium**.