1 1 The differences between plant and animal cells.

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1 1 The differences between plant and animal cells

Transcript of 1 1 The differences between plant and animal cells.

Page 1: 1 1 The differences between plant and animal cells.

1 1

The differences between plant and

animal cells

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• Chromosomes are copied (# doubles)• All organelles and cytoplasm double• Chromosomes appear as long thin threadlike

coils (chromatin)

Cell MembraneNucleus

Cytoplasm

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Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

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• Centrioles (or poles) appear • Spindle fibers form near centrioles.• Centromeres appear, hold chromosomes together

• Nuclear membrane begins to disappear

CentriolesChromosomes

Spindle fibersCentromere

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Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Spindle fibers

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• Chromosomes attach to the spindle fibers.

• Chromosomes line up in center of cell

Centrioles

Spindle fibers

ChromosomesCentromere

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Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

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• Centrioles tug on spindle fibers• Chromosomes separate and begin to

move to opposite ends of the cell. • Centromeres disappear

Centrioles

Spindle fibers

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Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

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• Two new nuclei form. • Spindle fibers and centrioles disappear.• Mitosis ends.

Nuclear membraneNuclear membrane

ChromosomesChromosomes

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Cytoplasm Divides•Animal Cell - Cell membrane moves inward •Plant Cell – Cell plate moves outward

Animal Plant

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Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

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Animal Cell Division- Review

Interphase

                                                            

Prophase

                                             

               

Metaphase

                                                            

Anaphase

                                             

               

Telophase

                                                            

Cytokinesis

                                             

               

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Plant Cell Division- ReviewInterphase

                                                        

    

Prophase

                                                       

     

Metaphase

                                                        

    

Anaphase

                                                       

     

Telophase

                                                        

    

Cytokinesis

                                                       

     

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Three reasons why cells Three reasons why cells reproduce asexually:reproduce asexually:

GGrowth- rowth- needed so organisms can needed so organisms can developdevelop

RRepair- epair- injured tissuesinjured tissues

RReplace – eplace – worn out cells worn out cells

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What type of cells never What type of cells never leave interphase?leave interphase?

MuscleMuscle NerveNerve

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Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.

How does it develop??

Cells that reproduce by asexual reproduction reproduce constantly.

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- Cell Division

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http://www.cellsalive.com/mitosis.htm

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How do little elephants grow up to be BIG elephants?

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The process of asexual reproduction begins

after a sperm fertilizes an egg.

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Animated Mitosis Cyclehttp://www.cellsalive.com/mitosis.htm

• Interphase

• Prophase

• Metaphase

• Anaphase

• Telophase

• Cytokinesis


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