Which of the following adaptations allows a sperm cell to swim towards the egg?

The correct answer is B. The presence of cilia or flagella. Sperm cells are adapted for swimming towards the egg in order to fertilize it. One of the key adaptations that allows sperm cells to swim is the presence of cilia or flagella. Cilia are small, hair-like projections that are found on the surface of many types of cells and are used for movement. Flagella are longer, whip-like projections that are also used for movement. Sperm cells have a single, long flagellum that extends from the head of the cell and is used for propulsion. The movement of the flagellum propels the sperm cell through the female reproductive tract towards the egg. A. and C. are incorrect because these are not an adaptation that allow a sperm cell to swim. D. A rigid cell wall is incorrect because it is not an adaptation that allows a sperm cell to swim and is not found in sperm cells. Sperm cells do not have cell walls.