What happens to a spermatid to change it into a sperm cell? Meiosis occurs, making a cell with n chromosomes.
The nuclei of two polar bodies fuse, making a cell with 2n chromosomes.
A tail is added, making the sperm a motile cell.
A membrane hardens, making the sperm a nonmotile cell.

The production of cells during mitosis into specialized function is recombination or differentiation

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.