Download All organisms are made of cells

All organisms are made of
cells
Ch. 6.1
Cells are the basic part of biology
ALL organisms are made of cells
The Cell Theory
Microscopes have made it much easier
to begin to understand cells
1st light microscopes were developed
around 1600
Robert Hooke was the 1st to look at
cork (oak bark) using a light microscope

Had compartments; named CELLS
CELL THEORY  generalization that
ALL living things are composed of cells.
Microscopes as Windows to
Cells
Light Microscopes can magnify objects
up to about 1,000 times
Much of the cell structure is smaller
than that!
Can use other microscopes


Scanning electron microscope
Transmission electron microscope
An Overview of Animal and
Plant Cells
Each part of a cell with a specific job to
do is an ORGANELLE(mini organ)
Previous slides show a diagram of both an
animal cell and a plant cell
Many differences
Many similarities

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PLASMA MEMBRANE  defines the boundary of
the cell and regulates traffic btwn cell and its
surroundings
NUCLEUS  holds the genetic material of the cell
(DNA)
Both have CYTOPLASM  holds dif.
organelles suspended in fluids
Plant cells have a CELL WALL; animal
cells don’t.
Two Major Classes of Cells
PROKARYOTIC  lacks a nucleus and
most organelles

Bacteria
EUKARYOTIC  has a membraneenclosed nucleus and organelles
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Plants
Fungi
animals
Concept Check
What evidence led to the development
of the cell theory?
How do the various kinds of
microscopes differ as tools in the study
of cells?
Identify two similarities and two
differences between plant and animal
cells.
How is a eukaryotic cell different from
a prokaryotic cell?