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Biology Revision
B2.2 ­ How Plants Produce Food
Key Words
Photosynthesis ­ the process by which plants make food using carbon dioxide, water and light
Chloroplasts ­ the organelles in which photosynthesis takes place
Chlorophyll ­ the green pigment contained in the chloroplasts
Glucose ­ a simple sugar

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Iodine solution is a yellowy-brown solution which turns dark blue when it reacts with starch.
Adapted Leaves
The leaves of plants are perfectly adapted because:
Most leaves are broad, they have a big surface area for light to fall on
They contain chlorophyll in the chloroplasts to absorb the light…

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o Plants use some of the energy from respiration to combine sugars with other nutrients from
the soil to make amino acids. These amino acids are then built up into proteins to be used in
the cells. Energy from respiration is also used to build up fats and oils to…

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When plants die and decay the nitrates and other minerals are returned to the soil to be used by
other plants.
If a plant does not get enough minerals, its growth will be poor. It will suffer from deficiency
deficient in nitrate - it will suffer from stunted growth…


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