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

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.

the sphincter muscles at the end of the digestive tract is the anus.

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics