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Section 7.1- Life is Cellular
Section 7.2- Eukaryotic Cell Structure
Section 7.3- Cell Boundaries
Section 7.4- Diversity of Cellular Life
Discovery of Cells
Robert Hooke
 Used light
microscope to look at
cork cells
 Cells reminded him
of monk cubicles
 “many little boxes”
 Called them CELLS
Discovery of Cells
Anton van
Leewenhoek
 First to observe
living cells
 Invented simple,
tiny microscopes

The cell theory states that:
all living things are composed of one or more cells
 cells are the basic units of structure and function in
an organism
 cells come only from the reproduction of existing
cells


Cellular Basis of Life

All living things
 are made of organized parts
 obtain energy from their surroundings
 perform chemical reactions
 change with time
 respond to their environment
 reproduce.

Prokaryotes
Prokaryote cells lack
a nucleus and
membrane-bound
organelles.
 Have genetic material
not contained in a
nucleus


Eukaryotes

Eukaryote cells have a nucleus and membranebound organelles