Ookinete is

Options

A. (a) rounded structure
B. (b) nonmotile
C. (c) motile
D. (d) egg like

Answer

### Step-by-Step Solution:

1. **Definition of Ookinete**:
- Ookinete is a motile zygote that occurs during the life cycle of the Plasmodium parasite, which is responsible for malaria.

2. **Formation of Ookinete**:
- The ookinete is formed when two gametes (male and female) of the Plasmodium species fuse together to create a zygote.

3. **Location of Ookinete**:
- After its formation, the ookinete develops in the gut of the female Anopheles mosquito, which is the vector for malaria transmission.

4. **Transformation**:
- The ookinete undergoes a transformation process approximately 12 hours after its formation, eventually developing into sporozoites.

5. **Role of Sporozoites**:
- The sporozoites are the infectious form of the parasite that can infect healthy humans, completing the life cycle of Plasmodium.

6. **Characteristics of Ookinete**:
- It is important to note that the ookinete is motile, which distinguishes it from other forms like the zygote that may not be motile.

### Final Answer:
- Ookinete is a motile zygote that occurs in the life cycle of Plasmodium, specifically in the gut of female Anopheles mosquitoes.

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