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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.