Which is the fastest mode of locomotion ?

Options

A. Wriggling
B. Pseudopodial
C. Ciliary
D. Flagellar.

Answer

To determine the fastest mode of locomotion among the given options, we can analyze each one:

1. **Wriggling**: This mode of locomotion is typically seen in organisms like earthworms or certain types of protozoa. It involves a serpentine movement which can be effective but is not the fastest.

2. **Pseudopodia**: This is a mode of locomotion used by amoebas and involves the extension of the cell membrane to form temporary projections called pseudopodia. While it allows for movement, it is generally slower compared to other methods.

3. **Ciliary Movement**: This involves the use of tiny hair-like structures called cilia that cover the surface of some protists. These cilia beat in a coordinated manner, creating a wave-like motion that propels the organism forward. This method is known for its speed and efficiency.

4. **Flagellar Movement**: This mode involves the use of one or two long whip-like structures called flagella. While flagellar movement can be fast, it is typically not as rapid as ciliary movement due to the nature of the propulsion mechanism.

After analyzing all the options, we can conclude that:

**The fastest mode of locomotion among the given options is ciliary movement.**

This is because cilia can beat in a coordinated and rapid manner, allowing for quick movement through the water.