150310
Description
Flashcards by Charlotte G, updated more than 1 year ago
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Created by Charlotte G
over 11 years ago
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| Question | Answer |
| What is a limiting factor? | A single factor that when in short supply can limit the rate of a process (e.g. photosynthesis) |
| Name three limiting factors of photosynthesis. | 1) Light intensity 2) Carbon dioxide concentration 3) Temperature |
| Why does the rate of photosynthesis speed up when light intesity increases? | Because light is necessary for a plant to photosynthesise and more of it will make the plant photosynthesise quicker. |
| What would a graph to show the rate of photosynthesis against light intensity look like? |
Image:
photosyn_1.gif (image/gif)
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| What happens to the rate of photosynthesis and enzymes if it gets too cold? | The rate of photosynthesis decreases and enzymes have little energy. |
| What happens to the plant if the temperature gets too hot? | Plants cannot photosynthesise if it is too hot, the enzymes denature and the stomata close to prevent water loss. |
| What would a graph showing rate of photosynthesis against temperature look like? |
Image:
photosyn_3.gif (image/gif)
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| What happens to the rate of photosynthesis as carbon dioxide concentration increases? | As carbon dioxide concentration increases, the rate of photosynthesis increases because carbon dioxide is necessary for the process. |
| What would a graph showing carbon dioxide concentration against rate of photosynthesis look like? |
Image:
photosyn_2.gif (image/gif)
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| If the light intensity and carbon dioxide are at a constant, what must be the limiting factor and why? | Temperature must be the limiting factor because when the other variables are constant, increasing the variables does not increase the rate of photosynthesis |
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