Biology - Photosynthesis - B2.3

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  • Created by: shcoool
  • Created on: 16-05-15 18:31
How do plants produce their own food?
They use light energy and raw materials from the air and soil to produce the food they need.
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What is the equation for photosynthesis?
carbon dioxide+water (+light energy)> glucose+oxygen
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What happens during photosynthesis?
light energy is absorbed by the green substance called chlorphyll, which is found in chloroplasts, energy is used to convert carbon dioxide from the air and water from the soil into glucose, oxygen is released a s a by-product
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How may the rate of photosynthesis be affected?
by limiting factors: shortage of light, low temperature, shortage of carbon dioxide
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Give 4 ways in which the plant uses glucose
Converted into insoluble starch for storage, for respiration, to produce fat or oil for storage, to produce cellulose which strengthens the cell wall
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What can glucose produce?
produce proteins with nitrate ions from soil, produce chlorophyll with magnesium ions from soil
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What are the six of a leaf and what do they do?
waxy cuticle - waterproof so limits water loss, upper epidermis - does nothing, palisade mesophyll - have chloroplasts, spongy mesophyl - has chloroplasts and air spaces to reduce distance for diffusion, lower epidermis
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What is in the lower epidermis and what does it do?
Guard cells control the size of the stomata which lets gases in an dout
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Name the four main uses for glucose?
storage, synthesis, respiration and cellulose
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Other cards in this set

Card 2

Front

What is the equation for photosynthesis?

Back

carbon dioxide+water (+light energy)> glucose+oxygen

Card 3

Front

What happens during photosynthesis?

Back

Preview of the front of card 3

Card 4

Front

How may the rate of photosynthesis be affected?

Back

Preview of the front of card 4

Card 5

Front

Give 4 ways in which the plant uses glucose

Back

Preview of the front of card 5
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