Which of the following is not an example of flagellar movement?

Options

A. Swimming of spermatozoa
B. Maintenance of water current in the canal system of sponges
C. Movement of ova in fallopian tube
D. Locomotion in Euglena

Answer

To determine which of the following options is not an example of flagellar movement, we can analyze each option provided in the question:

1. **Spermatozoa**: Sperm cells have a long tail known as a flagellum. This flagellum beats in a whip-like motion, allowing the sperm to swim towards the egg. Therefore, this is an example of flagellar movement.

2. **Canal system of sponges**: Sponges have specialized cells called choanocytes that possess flagella. These flagella beat to create water currents, which help in feeding and respiration. Thus, this is also an example of flagellar movement.

3. **Movement of ova in the fallopian tube**: The movement of ova is facilitated by cilia, which are hair-like structures on the fimbriae of the fallopian tube. Cilia and flagella are different structures; cilia are shorter and move in a coordinated wave-like manner. Therefore, this is not an example of flagellar movement.

4. **Locomotion in Euglena**: Euglena is a single-celled organism that moves using a flagellum. The flagellum beats to propel the organism through water, making this an example of flagellar movement.

Based on the analysis, the option that is not an example of flagellar movement is:

**Movement of ova in the fallopian tube.**