Biology

3. is the removal of the waste products of metabolism and substances in excess of requirements
4. main substance in the walls of plant cells, helping plants to remain stiff and upright.
6. is the ability to detect and respond to changes in the internal or external environment
7. a tiny structure where amino acids are assembled to make protein molecules
8. Power center of cell
10. Have no membrane-covered nucleus, no membrane-covered organelles and are bacteria
12. The control center of the cell
17. green pigment that plants use to make food during a process called photosynthesis.
18. is an action by an organism or part of an organism causing change of position or place
19. is the process of an individual organism growing organically
21. chemical reactions in cells that break down nutrient molecules and release energy for metabolism
22. temporary storage of food, enzymes and waste products, also helps support the shape of the plant

1. outer layer of all cells
2. a single-celled microorganism that is a member of the Fungi kingdom
5. permanent increase in size and dry mass by an increase in cell number or cell size or both
9. a plastid that contains chlorophyll and in which photosynthesis takes place.
11. Have membrane-covered nuclei, membrane-covered organelles and are all cells except bacteria
13. a rigid, external layer which provides structural support and rigidity
14. small, circular, double-stranded DNA molecule distinct from a cell's chromosomal DNA.
15. is the process that makes more of the same kind of organism
16. a jelly-like fluid contained in the cell that holds the organelles.
20. takes in materials for energy, growth and