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10 terms

Chapter 7 Cell Structure and Function:Section 1 Life is Cellular

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cell
basic unit of life
cell theory
1. All living things are composed of cells
2. Cells are the basic units of structure and function in living things.
3. New cells are produced from existing cells.
cell membrane
a thin, flexible barrier around the cell
cell wall
a strong layer around the cell membrane
nucleus
a large structure that contains the cell's genetic material and controls the cell's activities
cytoplasm
the material inside the cell membrane-but not including the nucleus
prokaryote
single-celled microorganism that lacks a nucleus
eukaryote
organosm whose cells contain a nuclei
organelle
specialized structure that performs important cellular functions within a eukaryotic cell
Prokaryotes and Eukaryotes (KEY CONCEPTS)
Biologists divide cells into two categories: eukaryotes and prokaryotes. The cells of Eukaryotes have a nucleus, but the cells of prokaryote do not.