Cells

6. The cell theory states that all biological organisms are composed of cells
7. a eukaryotic cell
8. a type of eukaryotic cell that lacks a cell wall
11. an optical instrument used for viewing very small objects
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.

1. a plastid that contains chlorophyll and in which photosynthesis takes place.
2. A small structure in a cell
3. the central and most important part of an object, movement, or group, forming the basis for its activity and growth.
4. a microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles.
5. small single-celled organisms
9. an organelle found in big numbers in cells
10. the basic building blocks of all living things.
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.