GCSE Biology Photosynthesis
View more presentations from Carla Smedberg.
Showing posts with label workbook 02; Photosynthesis. Show all posts
Showing posts with label workbook 02; Photosynthesis. Show all posts
Leaf structure
1 Waxy cuticle - prevents excess water loss by evapouration
2 Epidermis - prevents water loss and harmful substances entering the cell
2 Epidermis - prevents water loss and harmful substances entering the cell
3 Pallisade layer - made of palisade cells which have many chloroplast to allow lots of photosynthesis
4 Spongy layer - cells have some chloroplast to allow some photosynthesis with lots of air spaces
5 Air spaces - to allow gases (carbon dioxide and oxygen) to diffuse into/out of the leaf 6 Stomata - Allows carbon dioxide into the leaf and oxygen out. Also controls the amount of water lost from the plant.
6 Stomata - Allows carbon dioxide into the leaf and oxygen out. Also controls the amount of water lost from the plant.
Limiting Factors
RATE OF PHOTOSYNTHESIS
How fast photosynthesis happens depends a few limiting factors on the temperature, amount of light, the concentration of carbon dioxide and water. We can measure how fast photosynthesis is occuring by measuring how much oxygen is produced.
Use the interactive animation to see the affect of limiting factors on the rate of photosynthesis
http://ilo.ecb.org/SourceFiles/photosynthesis.swf
How fast photosynthesis happens depends a few limiting factors on the temperature, amount of light, the concentration of carbon dioxide and water. We can measure how fast photosynthesis is occuring by measuring how much oxygen is produced.
Use the interactive animation to see the affect of limiting factors on the rate of photosynthesis
http://ilo.ecb.org/SourceFiles/photosynthesis.swf
GCSE Biology Limiting factors
View more presentations from Carla Smedberg.
USES OF THE PRODUCTS OF PHOTOSYNTHESISThe process of photosynthesis allows the plant to grow by producing new tissue.
Plants need to photosynthesize to produce glucose. This sugar can be used by the plant in the process of respiration.
Plants will respire during the day and also at night and so require sugars 24 hours a day.
Respiration provides the plant with energy for growth, reproduction and a variety of cell functions.
Some of the glucose produced during photosynthesis is not used immediately and is stored by the plant. The glucose is converted into an insoluble substance called starch and stored in the plant leaves, stem or roots.
A good example of this is in potatoes and wheat, which contain high levels of starch.
Plants need to photosynthesize to produce glucose. This sugar can be used by the plant in the process of respiration.
Plants will respire during the day and also at night and so require sugars 24 hours a day.
Respiration provides the plant with energy for growth, reproduction and a variety of cell functions.
Some of the glucose produced during photosynthesis is not used immediately and is stored by the plant. The glucose is converted into an insoluble substance called starch and stored in the plant leaves, stem or roots.
A good example of this is in potatoes and wheat, which contain high levels of starch.
Plant Mineral Salts
MINERAL SALTS
Plants require minerals to allow healthy growth, just like we need vitamins and minerals to keep us healthy.
Plants require minerals to allow healthy growth, just like we need vitamins and minerals to keep us healthy.
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