Question

Gliding locomotion in protozoans is effected by:

• A. Myonemes
• B. Flagella
• C. Cilia
• D. Pseudopodia

Hint:

{Myonemes} are contractile protein filaments (like muscle) found in the pellicle of some protozoans.

Answer 1

The Correct Option is A

Step 1: Analyze Locomotion Types in Protozoa:

• Pseudopodia: Amoeboid movement (e.g., \Amoeba).
• Flagella: Flagellar movement (e.g., \Euglena).
• Cilia: Ciliary movement (e.g., \Paramecium).
• Gliding/Metaboly: Seen in Sporozoans (e.g., \Monocystis, \Plasmodium sporozoites) and some flagellates. This movement is often attributed to contractile fibrils in the pellicle or cortex.

Step 2: Identify the Organelle:
The contractile fibrils responsible for body contraction and gliding/wriggling movements (gregarine movement) in these organisms are called **Myonemes**.
Step 3: Final Answer:
Option (A) is the correct effector for gliding/metabolic movement in this context.