photosynthesis
- Created by: connie.b
- Created on: 24-09-20 19:25
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- photosynthesis
- how are leaves adapted?
- veins carry water to the leaf and take food from the leaf to the rest of the plant (veins also help support the leaf)
- palisade plant cells contain chloroplasts with chlorophyll
- a leaf is broad and flat to capture lots of sunlight
- small holes called stomata in the underside of the leaf allow gases in and out
- stomata: let in C02 and water vapour
- how are plants adapted?
- stem: provides support and carries nutrients and water up the plant, holds reproductive parts
- xylem: moves water a minerals from the roots through the rest of the plant
- phloem: moves food substances through the plant
- leaves: big, flat, thin shape, large surface area to maximize photosynthesis, stomata on the underside of the leaf, guard cells around stomata
- roots: gets nutrients and water from the soil to grow, acts as an anchor in the ground, large surface area
- stem: provides support and carries nutrients and water up the plant, holds reproductive parts
- how do plants make their own food?
- they turn it into proteins for growth although they need nitrate ions absorbed through roots to help with this
- they turn it into fats and oils, another good energy store
- they use the glucose to make energy in respiration
- they convert it into insoluble starch and store it in the leaves
- they turn it into cellulose which makes the cell storg
- the rate of photosynthesis in a plant can be limited by:
- light intesity
- as the temperature increases so does the rate of photosynthesis, but at 40 degrees Celsius the rate falls sharply as enzymes are denatured
- availability of water
- availability of carbon dioxide
- availability of chlorophyll
- temperature
- as light increases so the photosynthesis but there comes a point where it cant increase anymore
- light intesity
- how are leaves adapted?
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