Biology revision

2. Transfers food
6. Transfers water and mineral ions in a leaf
7. They are not classified as living organisms because they rely on host cells to survive and reproduce.
9. Used in building cell walls.
11. Includes the brain, spinal cord, and a complex network of nerves.
13. The chemical reactions in the body's cells that change food into energy.
14. Occurs with oxygen and releases more energy but more slowly.
15. Used in plants for energy and to make other substances like cellouse and starch.
17. Runs from the brain down through the back.
18. The movement of glucose/ sucrose and amino acids from sources to sinks through the phloem.

1. Occurs without oxygen and releases less energy but more quickly.
2. Communicable diseases are caused by this.
3. A self-regulating process by which biological systems maintain stability while adjusting to changing external conditions.
4. Pathogens are.....?
5. In leaves the Xylem and Phloem form what?
8. Stored in seeds and other plant parts as a food source.
10. The xylem is in the middle surrounedd by the phloem in what?
12. Small prokaryotic cells that can infect both plants and animals.
16. Plays a central role in all metabolic processes in the body