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Where do cells come from?

Explore the stages of mitosis where cells divide and reproduce, derived from cell theory that all living things are made of cells and cells come from pre-existing cells. Learn about the process in high school biology.

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Where do cells come from?

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  1. Where do cells come from?

  2. Cell Theory • All living things are made of cells. • Cells are the basic unit of life. • Cells come from other cells. Schwann – animal cells 1839 Schleiden – plant cells 1839 Virchow – cell come from pre-existing cells 1855

  3. Are these made of cells?

  4. What about these plants?

  5. This process of division is called Mitosis. It occurs in multiple stages or phases. You will learn the details of this process in high school biology. • However, today, we are observing cells that are going through different stages of the reproductive process called Mitosis.

  6. Onion Root Cell Reproduction

  7. Steps of Mitosis

  8. INTERPHASE PROPHASE METAPHASE ANAPHASE TELOPHASE CYTOKINESIS Normal Cell Activities – DNA in chromosomes is copied at end of stage Chromosomes thicken and become visible. (getting ready to divide) Chromosomes line up in middle of cell (in pairs – sister chromatids) Chromatids pull apart – half go to each side Nuclear membrane forms around both ends of chromatids. Cell membrane separates into two new cells.

  9. Whitefish Mitosis http://www.biologycorner.com/projects/mitosis/whitefish_embryo.html Onion Root Tip Mitosis http://www.biologycorner.com/projects/mitosis/onion_root.html

  10. Summary Where would you say cells come from? How do cells reproduce?

  11. Summary Where would you say cells come from?Cells come from other cells. How do cells reproduce?

  12. Summary Where would you say cells come from?Cells come from other cells. How do cells reproduce? Cells divide through MITOSIS.

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