The mode of ingestion of active prey in Amoeba is called

Options

A. circumfluence
B. circumvellation
C. import
D. all of these

Answer

To answer the question regarding the mode of ingestion of active prey in Amoeba, we will analyze the different methods of food intake that Amoeba employs.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the specific mode of ingestion that Amoeba uses to consume active prey.

2. **Identifying the Options**: The options provided include:
- Import
- Invagination
- Circumfluence
- Circumvallation

3. **Explaining Each Option**:
- **Import**: This refers to the process where Amoeba takes in food upon contact. However, this is not specific to active prey.
- **Invagination**: In this process, the Amoeba forms an ectoplasmic tube to suck in the food upon contact. Again, this is not specifically for active prey.
- **Circumfluence**: This method involves the Amoeba extending its pseudopodia around a motionless organism, effectively enveloping it to form a food vacuole. This is more relevant to stationary organisms rather than active prey.
- **Circumvallation**: This is the specific method where the Amoeba engulfs an active prey. This process involves the Amoeba actively surrounding and engulfing the prey, making it the correct answer.

4. **Conclusion**: Based on the explanations, the mode of ingestion of active prey in Amoeba is called **Circumvallation**.

### Final Answer: Circumvallation

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