The amoeboid movement results from

Options

A. interaction among actin, myosin and ATP, etc.
B. coordinated beats of cilia
C. whip like action of flagella
D. action by the mitotic spindle, similar to what happens during mitosis and meiosis.

Answer

### Step-by-Step Solution:

1. **Understanding Amoeboid Movement**:
- Amoeboid movement is a type of locomotion primarily observed in unicellular organisms like amoeba. It involves the extension of the cell membrane to form pseudopodia (false feet).

2. **Mechanism of Amoeboid Movement**:
- The movement is facilitated by cytoplasmic streaming, which allows the cell to extend its membrane and form pseudopodia. This process is driven by interactions among various proteins and energy sources.

3. **Identifying Key Components**:
- The key proteins involved in amoeboid movement are actin and myosin. Actin filaments provide structural support and facilitate the extension of pseudopodia, while myosin interacts with actin to enable contraction and movement.

4. **Role of ATP**:
- ATP (adenosine triphosphate) serves as the energy currency of the cell. It provides the necessary energy for the interactions between actin and myosin, allowing for the contraction and relaxation needed for amoeboid movement.

5. **Evaluating the Options**:
- The question provides several options regarding the cause of amoeboid movement:
- A) Interactions among actin, myosin, and ATP
- B) Coordinated beating of cilia
- C) Whiplike action of flagella
- D) Action by the mitotic spindle
- Analyzing these options, we can eliminate B, C, and D as they pertain to different types of movement (ciliary and flagellar movement) or cell division (mitotic spindle).

6. **Conclusion**:
- The correct answer is option A: Amoeboid movement results from interactions among actin, myosin, and ATP.