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Nutrition in Plants Chapter 7
[object Object],Recall: ,[object Object],Carbon dioxide + water   glucose + oxygen + water 6CO 2  + 12H 2 O     C 6 H 12 O 6  + 6O 2  + 6H 2 O   chlorophyll sunlight chlorophyll sunlight
Importance of photosynthesis ,[object Object],[object Object],[object Object],[object Object]
Lesson Objectives: ,[object Object],[object Object],[object Object]
What is a plant? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
 
 
Venation branch veins mid-rib vein network
Label the parts of a leaf
Refer to page 129 textbook (no chloroplasts) (no chloroplasts)
Leaf Structure
Label the cells in the leaf upper epidermis lower epidermis stoma palisade mesophyll spongy mesophyll Intracellular spaces cuticle
 
Main site of photosynthesis ,[object Object],[object Object],[object Object],[object Object],Cells contain numerous  chloroplasts  which enable them to absorb max. sunlight for photosynthesis
Stomata ,[object Object],guards cells stoma
Guard cells ,[object Object],[object Object],[object Object],[object Object],How?
Structure of stomata
Action of guard cells ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
Gaseous exchange in the leaf of a plant
[object Object],Gaseous exchange in the leaf of a plant Back http:// web.ukonline.co.uk/webwise/spinneret/plants/leafst.htm
Entry of carbon dioxide In daylight, photosynthesis occurs Carbon dioxide rapidly used up Carbon dioxide concentration in leaf becomes lower than atmospheric air Diffusion gradient exists Carbon dioxide diffuses from the external environment through the stomata into the air spaces in the leaf Film of water on surface of mesophyll cells so that carbon dioxide can dissolve; dissolved carbon dioxide diffuses into the cells
Activity: ,[object Object]
How do we distinguish between the xylem and phloem?

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Chapter 7 Nutrition in Plants Lesson 1 - Structure of plants and leaves, Gaseous exchange in plants

  • 2.
  • 3.
  • 4.
  • 5.
  • 6.  
  • 7.  
  • 8.  
  • 9. Venation branch veins mid-rib vein network
  • 10. Label the parts of a leaf
  • 11. Refer to page 129 textbook (no chloroplasts) (no chloroplasts)
  • 13. Label the cells in the leaf upper epidermis lower epidermis stoma palisade mesophyll spongy mesophyll Intracellular spaces cuticle
  • 14.  
  • 15.
  • 16.
  • 17.
  • 19.
  • 20.  
  • 21. Gaseous exchange in the leaf of a plant
  • 22.
  • 23. Entry of carbon dioxide In daylight, photosynthesis occurs Carbon dioxide rapidly used up Carbon dioxide concentration in leaf becomes lower than atmospheric air Diffusion gradient exists Carbon dioxide diffuses from the external environment through the stomata into the air spaces in the leaf Film of water on surface of mesophyll cells so that carbon dioxide can dissolve; dissolved carbon dioxide diffuses into the cells
  • 24.
  • 25. How do we distinguish between the xylem and phloem?