KEY CONCEPT _____ are the _____ ____ of ____.

The ____ ______ grew out of the work of ____ _________ and __________ in the _________. Many scientists contributed to the cell theory Hooke: _________ ____ while looking at ____ under the __________. Leewenhoek: 1st to observe ________ & ________ (_______; ______) Schleiden: ______ ___ composed of ____. Schwann: ________ are composed of _____. Virchow: _____ come from other _____.

The cell theory grew out of the work of many scientists and improvements in the microscope. Many scientists contributed to the cell theory. More was learned about ____ as ___________ ________. The ____ ______ is a _________ _______ of _______.

Early studies led to the development of the cell theory. The Cell theory has _____ __________. All __________ are made of ____.

Early studies led to the development of the cell theory. The Cell theory has three principles. All organisms are made of cells. All _________ _____ are produced by ____living ____.

Early studies led to the development of the cell theory. The Cell theory has three principles. All organisms are made of ____. All existing cells are produced by _____ ______ ____. The ____ is the most _____ ____ of ____.

All cells share certain characteristics. Cells tend to be __________. ____________ cells lack a ______ and ____ _______ __________ of ____________ cells. All cells share certain characteristics. Cells tend to be __________. All cells are ________ by a ________. All cells are filled with __________. cell membrane Bacterium (colored SEM; magnification 8800x) cytoplasm

There are two cell types: __________ cells and ________ cells. __________ cells have a ________. ___________ cells do not have ________- ______ __________. nucleus organelles cell membrane

There are two cell types: eukaryotic cells and prokaryotic cells. ____________ cells do ___ have a ________. ___________ cells do not have ________-_____ ___________. nucleus organelles cell membrane cytoplasm