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Biology - Chap. 7
review for 7.1
Term | Definition |
---|---|
cell | basic & smallest units of life; discovered by Robert Hooke who used a microscope to study cork |
bacteria | discovered by Anton Van Leeuwenhoek |
cell theory | all living things are made up of cells |
cell theory | cells are the basic units of structure and function in living things |
cell theory | new cells are produced from existing cells |
microscopes (light) | use lenses to magnify the image of an object by focusing light or electrons |
microscope (electron) | used to see very small cellular structures |
cell membrane | thin flexible barrier surrounding cells |
plasma membrane | cells in connection with direct fluid of the blood |
nucleus | contains genetic DNA & controls cell's activities |
Eukaryotes | cells that enclose their DNA in nuclei; separate their genetic material from the rest of the cell |
Prokaryotes | cells that don't enclose their DNA in nuclei; don't separate their genetic material within the nuclei |