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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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purpose of cell division
Purpose of Cell Division

Three purposes of cell division:

  • Reproduction
  • Repair
  • Growth
cell division for reproduction
Cell Division For Reproduction
  • All cells use cell division to reproduce
  • Each division results in two new cells
types of cell division
Types of Cell Division
  • Asexual Reproduction
    • Involves one parent cell
    • Produces two identical daughter cells each with a complete set of identical genetic information
types of cell division1
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.
cell division for repair
Cell Division for Repair
  • Replacement of damaged cells – cuts, broken bones.
  • Production of new red blood cells.
cell division for repair1
Cell Division for Repair
  • Millions of skin cells are shed

and replaced daily.

cell division for growth
Cell Division for Growth
  • Growth is a matter of increasing the number of cells that are present
  • Cells getting bigger doesn’t work
cell division for growth1
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.
cell division for growth3
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

cell division for growth4
Cell Division for Growth
  • Water enters a cell across the cell membrane in a process called

OSMOSIS.

osmosis diffusion
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.
osmosis diffusion1
Osmosis/Diffusion

Particles will diffuse through the first cell and into the next cell.

osmosis diffusion2
Osmosis/Diffusion

Concentration

is the amount of a substance present in a given volume of water.

vocabulary you need to become familiar with
Vocabulary you need to become familiar with!

Asexual Reproduction

Sexual Reproduction

Diffusion

Osmosis

Concentration

homework
Homework!

Page 37 Questions #1 - 6

microscopes
Microscopes
  • Let’s read the rules!
  • Identify parts and functions
    • Use Pg 605
drawing biological diagrams
Drawing Biological Diagrams
  • Draw a Biological diagram for the following image
  • Total Mag = Ocular Mag x Objective Mag x 100%
did he she
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)
slide25

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