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Plants can make their own food. The process by which plants make food using CO2, H2O and light
energy, this is called PHOTOSYNTHESIS. This takes place in the green parts of plants when it is light
Chloroplast contains CHLOROPHYLL. During photosynthesis LIGHT ENERGY is absorbed by
CHLOROPLAST. This energy is used to CONVERT CO2 from the air and WATER from the soil in to
a SIMPLE SUGAR CALLED GLUCOSE. The chemical reaction also produces OXYGEN.…read more

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Epidermis- protective layer of cells; this epidermis and cuticle are transparent to pass light to the
Veins- made up of tiny tubes; some carry water to the leaves and others carry glucose
Stomata- tiny holes in the lower surface of the leaves that allow gases in and out, A single hole is
called stoma
Key points
Leaves are adapted to allow maximum photosynthesis to take place
LIMITING FACTORS- factors which affect the limit of a reaction. E.g. photosynthesis
1.…read more

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Then as the light and
temperature increase in the morning, the CO2 all gets used up
Key points
There are 3 main factors that limit the rate of photosynthesis- light, temperature and CO2
We can artificially change the environment in which we grow plants. We can use this to observe
the effect of different factors on the rate of photosynthesis.…read more

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GLUCOSE is SOLUBLE, it affects the way water moves in and out of the cells, so large amounts of
glucose stored in the plant cells could affect the water balance of whole plant. Therefore PLANTS
CONVERT GLUCOSE TO STACRCH, WHICH IS INSOLUBLE. This means plants can store large amounts
of starch in their cells without it having any effect on water.…read more

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lisa linsdell

Good revision notes on photosynthesis, limiting factors and minerals in plants. Watch out for the odd typo especially with the word PHLOEM, not PHOLEM. This aside, key words and phrases are highlighted for easier understanding.

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