Download Cell: Smallest Unit of Life

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Transcript 

SEM
2,000
Eukaryotic vs
Prokaryotic
What are the major criteria for
the divisions of this tree?
Comparison of Cell Types
Prokaryotic cell
Colorized TEM 15,000 
Nucleoid
region
Nucleus
Eukaryotic cell
Note - Size, scale, internal
organization of each
Organelles
Prokaryotic Cell Structure
Lacking well defined
nuclei or organelles
Variety of shapes and
sizes
Variety of Shapes and Sizes
Prokaryotic
Compartmentalization
Many small enclosed
environments to
create environments
for unique chemical
reactions.
Note the continuous flow of
membranous
compartments
Endomembrane systeminternal system of
membrane bound
compartments
Animal Cell
Plant Cell
Scale of Life
Cells are limited in size because of
surface area to volume ratio
What is the biggest cell in the
human body?
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