Bio 3.3

2. The process by which an egg cell and sperm cell join together.
4. A fertilized egg that has begun cell division
7. Any unspecialized cell in a multicellular organism, except a sperm or egg cell, that can divide and become any cell type in the body.
8. Able to produce only its own type of cell.
9. A system that transports water or other needed substances throughout an organism.
13. A type of tissue that covers organs or forms the inner lining of hollows in the body.
16. A type of tissue in the body that provides support and protection, fills spaces, stores fat, produces blood cells, and helps to repair damage.
18. To further develop or specialize, especially in cells or tissues.
19. The act of tightening in the process of movement.
20. A group of about 100 cells, of two types, that form from a fertilized egg. Each of these cells can develop into almost any type of cell.

1. A partially differentiated stem cell, before it has developed into its final form.
3. The vascular tissue in plants that carries water and dissolved minerals upward from the roots to the rest of the plant.
5. A bundle of nerve fibers that carry signals to or from the brain.
6. Able to differentiate only into a closely related cell.
10. The energy stored in a chemical bond (or the bond energy).
11. From totipotent cells, able to differentiate into any type of cell in the human body but not any in the placenta.
12. The vascular tissue in plants that carries dissolved organic nutrients in all directions within the plant.
14. Not further developed or specialized, especially in cells or tissues.
15. The process of fertilization.
17. Able to differentiate into any type of cell of the human body or the placenta.