What is a zygote?

A-structure that nourishes the fetus

B-a sperm fused with an egg

C-an un-fertilizer egg

D-a ball of about 100 cells

The answer is B explanation I just got it right

B

Explanation:

A zygote is the resulting cell from fertilization.

Fertilization occurs when the sperm (the male gamete/sex cell) fuses with the egg (the female gamete/sex cell). After they fuse, or fertilize, a cell forms that contains half of the DNA from the father (sperm) and the other half from the mother (egg). It has a complete set of DNA, and is considered a haploid cell.

It is not the structure that nourishes the fetus, an un-fertilized egg, or a ball of about 100 cells. Therefore, the correct answer is B: a sperm fused with an egg.