Across
- 6. The cell theory states that all biological organisms are composed of cells
- 7. a eukaryotic cell that contains a true nucleus and certain organelles to perform specific functions
- 8. a type of eukaryotic cell that lacks a cell wall and has a true, membrane-bound nucleus along with other cellular organelles
- 11. an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times
- 13. an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus. Eukaryotes include all living organisms other than the eubacteria and archaebacteria
Down
- 1. a plastid that contains chlorophyll and in which photosynthesis takes place
- 2. any of a number of organized or specialized structures within a living cell.
- 3. the central and most important part of an object, movement, or group, forming the basis for its activity and growth
- 4. is a microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles. Prokaryotes include the bacteria and cyanobacteria
- 5. a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease
- 9. an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur
- 10. the smallest structural and functional unit of an organism
- 12. a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants it consists mainly of cellulose