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The Importance of Cell Division

The Importance of Cell Division. Why would a cell want to divide?. Purpose of Cell Division. Three purposes of cell division: Reproduction Repair Growth. Cell Division For Reproduction. All cells use cell division to reproduce Each division results in two new cells.

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The Importance of Cell Division

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  1. The Importance of Cell Division

  2. Why would a cell want to divide?

  3. Purpose of Cell Division Three purposes of cell division: • Reproduction • Repair • Growth

  4. Cell Division For Reproduction • All cells use cell division to reproduce • Each division results in two new cells

  5. Types of Cell Division • Asexual Reproduction • Involves one parent cell • Produces two identical daughter cells each with a complete set of identical genetic information

  6. Examples of Asexual Reproduction

  7. Types of Cell Division • Sexual Reproduction • Involves two parent cells • Each parent provides half the DNA found in the daughter cells. • Produces offspring with characteristics from both parents.

  8. Cell Division for Repair • Replacement of damaged cells – cuts, broken bones. • Production of new red blood cells.

  9. Cell Division for Repair • Millions of skin cells are shed and replaced daily.

  10. Cell Division for Growth • Growth is a matter of increasing the number of cells that are present • Cells getting bigger doesn’t work

  11. Cell Division for Growth • Cells all need energy, nutrients, water and gases to grow. • Chemicals need to be in solution to be used. • Cells need water to use chemicals and get rid of waste.

  12. Cell Division for Growth

  13. Cell Division for Growth • Chemicals enter a cell across the cell membrane, and travel through the cell to where it is used. • Movement of chemicals is called DIFFUSION

  14. Cell Division for Growth • Water enters a cell across the cell membrane in a process called OSMOSIS.

  15. Osmosis/Diffusion • …why do chemical particles move? • Chemicals move from an area of high concentration to low concentration. • Water moves to where the solution is more concentrated.

  16. Osmosis/Diffusion Particles will diffuse through the first cell and into the next cell.

  17. Osmosis/Diffusion Concentration is the amount of a substance present in a given volume of water.

  18. Vocabulary you need to become familiar with! Asexual Reproduction Sexual Reproduction Diffusion Osmosis Concentration

  19. Homework! Page 37 Questions #1 - 6

  20. Microscopes • Let’s read the rules! • Identify parts and functions • Use Pg 605

  21. Drawing Biological Diagrams • Draw a Biological diagram for the following image • Total Mag = Ocular Mag x Objective Mag x 100%

  22. Switch your Work

  23. Did he/she? • Name (first and last), date and teacher's name in top right hand corner • Title is appropriate • Title is underlined and centred in middle of page • Pencil is used for diagram and labels • Clean, thick, sharp lines; stippling is used for dark areas • Diagram takes up at least ½ of the page • Accurate drawing (draws what is seen)

  24. Records total magnification; is correctly calculated • Total magnification is recorded under drawing • Labels are printed to the right of the diagram • Labels are aligned under each other • Label lines are drawn with a ruler and do not cross each other • All structures are labeled correctly

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