Across
- 7. a self-replicating material that is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
- 9. a single-celled organism of the kingdom Protista, such as a protozoan or simple alga
- 11. a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants
- 12. A membrane transport protein is a membrane protein involved in the movement of ions
- 14. Compound microscopes are used to view small samples that can not be identified with the naked eye.
- 15. the material of which the chromosomes of organisms other than bacteria
- 16. an organism consisting of a cell or cells in which the genetic material is DNA
- 17. The CELL THEORY, or cell doctrine, states that all organisms are composed of similar units of organization,
- 18. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
- 19. the basic membrane-bound unit that contains the fundamental molecules of life.
- 20. a microscopic single-celled organism
Down
- 1. a plastid that contains chlorophyll and in which photosynthesis takes place.
- 2. The endosymbiotic theory states that some of the organelles in eukaryotic cells were once prokaryotic microbes.
- 3. An organelle is a sub cellular structure that has one or more specific jobs to perform in the cell
- 4. a lipid containing a phosphate group in its molecule
- 5. Chlorophyll is a green pigment found in plants
- 6. the central and most important part of an object
- 8. the action or process of magnifying something
- 10. Selective permeability is a property of cellular membranes that only allows certain molecules to enter or exit the cell.
- 13. the tendency toward a relatively stable equilibrium between interdependent elements