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12 Cards in this Set
- Front
- Back
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What is the word and symbol equation for photosynthesis?
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carbon dioxide + water > (with light energy) glucose + oxygen
6CO2 + 6H20 > C6H12O6+602 |
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What is taken into the leaf and what passes out of the leaf?
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CO2 is taken in and O2 in passed out
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What is diffusion?
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From a high concentration into a low concentration
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Label the leaf
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What is a stomata?
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Stomata are pore at the surface of leaves and are formed by two cells named guard cell. it allows CO2 to diffuse into the leaf to reach the photosynthetic tissues. they also allow oxygen and water to diffuse out. the guard cells change shape to open and close the stomata,
Flaccid Cells = lost water = pore is closed Turgid Cells = full of water = pore is open |
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How are leaves adapted for gas exchange?
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Thin + flat -increased surface area to receive gases, ie more cells get light, short diffusion distance for gases to travel through leaf
Air spaces - allow easy movement of gases through the leaf via diffusion Lots of stomata - to allow gases to enter and leave the leaf |
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What are limiting factors? and what are the three limiting factors
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They are resources that limit the rate of photosynthesis ie how fast it happens
carbon dioxide light intensity temperature |
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What happens if you increase the level of a limiting factor?
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If you increase the levels of a limiting factor then the rate of photosynthesis will increase - until another factor becomes limiting
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What will slow photosynthesis down in a plant? and what will stop photosynthesis?
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the less carbon dioxide and the colder the temperature.
If the temperature is too hot then the photosynthesis will stop all together |
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What are minerals and where are they found?
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Minerals are found in the soil and enter plants through their roots using diffusion or active transport. You can add fertiliser or manure to the soil to increase minerals
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What are the 2 most important minerals?
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Nitrate (to make amino acids for growth) and Magnesium (to make chlorophyll)
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What does it mean that a plant is deficient?
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There are not enough minerals,
- no nitrate - a plant which is small - no magnesium - a plant with yellow leaves |
