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Cells
The Basic
Units of
Life
Biology Lecture Launchers
from Benjamin Cummings and Discovery Channel School
Presentation prepared by Andrew Stull
© 2009 Pearson Education, Inc.
Cells
The cells in your brain
and in your elbow all
originated from a single
cell. How were they
able to specialize?
© 2009 Pearson Education, Inc.
Cells
© 2009 Pearson Education, Inc.
Cells
The cells in your brain
and in your elbow all
originated from a single
cell. How were they
able to specialize?
© 2009 Pearson Education, Inc.
Cells
Checkpoint
What is the function of the nucleus?
a. It houses DNA.
b. It packages material for transport.
c. It regulates materials moving into the cell.
d. It transports cell products.
e. none of the above
© 2009 Pearson Education, Inc.
Cells
Checkpoint
What is the function of the nucleus?
a. It houses DNA.
© 2009 Pearson Education, Inc.
Cells
Checkpoint
Mitosis is the process of ________.
a. protein synthesis
b. homeostasis
c. nuclear division
d. cell-cell communication
e. all of the above
© 2009 Pearson Education, Inc.
Cells
Checkpoint
Mitosis is the process of ________.
c. nuclear division
© 2009 Pearson Education, Inc.
Cells
Checkpoint
What is the function of the cell membrane?
a. intercellular joining
b. cell-cell recognition
c. transport
d. form a cellular boundary
e. all of the above
© 2009 Pearson Education, Inc.
Cells
Checkpoint
What is the function of the cell membrane?
e. all of the above
© 2009 Pearson Education, Inc.
Cells
Biology and Society
Cells in your body all carry the same
genetic information. What would
happen if they could revert to their
original, predifferentiated state and
begin again?
© 2009 Pearson Education, Inc.
Cells
Summary
• Everything that lives is made of cells and cellular
products.
• All cells share many common features.
• Cells come in a wide variety of shapes and serve
a variety of functions.
• A living cell is dynamic.
• Cells divide and replace themselves.
• Cells work together in multicellular organisms.
© 2009 Pearson Education, Inc.
Cells
There is controversy over the
use of embryonic stem cells in
medical research. Do you
know enough about the issues
to make an informed
decision?
© 2009 Pearson Education, Inc.