Malarial parasity

Options

A. Polygenetic
B. Digenetic
C. Monogenetic
D. Monomorphic.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the type of life cycle of the malarial parasite. We need to identify whether it is polygenetic, digenetic, monogenetic, or monomorphic.

2. **Defining the Terms**:
- **Polygenetic**: Organisms that complete their life cycle in many hosts.
- **Monogenetic**: Organisms that complete their life cycle in only one host.
- **Digenetic**: Organisms that complete their life cycle in two hosts.
- **Monomorphic**: Refers to organisms that have a single form or type.

3. **Analyzing the Malarial Parasite**: The malarial parasite, specifically Plasmodium species, is known to have a complex life cycle. It requires two different hosts to complete its life cycle.

4. **Identifying the Hosts**:
- The **primary host** of the malarial parasite is the mosquito (specifically the Anopheles mosquito), where the sexual phase of the life cycle occurs.
- The **secondary host** is humans or other vertebrates, where the asexual phase of the life cycle takes place.

5. **Conclusion**: Since the malarial parasite completes its life cycle in two hosts (mosquito and human), it is classified as **digenetic**.

### Final Answer:
The malarial parasite is **digenetic**.

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