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Notes on B2 for the written exam...

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  • Created by: Harry
  • Created on: 09-01-11 11:00

Cells - Animal

Animal Cells have:

  • Cell membrane - controls movement of materials.
  • Cytoplasm - where many chemical reactions happen.
  • Nucleus - controls the activities of the cell.
  • Ribosomes - proteins are synthesised (made) here.
  • Mitochondria - energy is released during aerobic       respiration.
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Cells - Plant

Plant Cells have all 5 things that animal cells have.

 

They also have:

  • Cell Wall - give the cell support & shape.
  • Chloroplasts - contain chlorophyll for photosynthesis.
  • Permanent Vacuole - contains cell sap.

 

Materials that can move across the cell membrane are Carbon Dioxide, Oxygen & Glucose.

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Cells - Specialised Cells

Some examples of specialised cells are:


  • In animals - sperm cells & nerve cells. 
  • In plants - root hair cells & xylem.

 

Differentiation happens as organisms develop and some cells become specialised to carry out certain jobs.


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Cells - Osmosis

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