Question 28

Flagellum enables sperm cells to move effectively.

The flagellum is a whip-like structure that provides motility to sperm cells, allowing them to swim toward the egg for fertilization.

A) Centriole

The centriole is a cylindrical cell structure involved in cell division and the formation of cilia and flagella. However, it does not directly contribute to the movement of sperm cells, making this option incorrect.

B) Cilium

Cilia are hair-like structures that can aid in movement, but they are typically shorter and more numerous than flagella. While cilia can help with movement in some cells, they do not provide the same propulsion mechanism as flagella, thus rendering this option incorrect for sperm cell mobility.

C) Centrosome

The centrosome is an organelle that serves as the main microtubule organizing center and plays a crucial role in cell division. It does not facilitate the movement of sperm cells, making this option incorrect.

D) Flagellum

The flagellum is specifically designed for locomotion in sperm cells, allowing them to swim efficiently through fluid environments. Its whip-like motion is essential for reaching the egg, confirming it as the correct choice.

Conclusion

The flagellum is the definitive structure that enables sperm cells to move effectively, as its unique design allows for efficient propulsion. In contrast, the other options—centriole, cilium, and centrosome—do not provide the necessary means for sperm motility, making them unsuitable answers.