Welcome to the Quiz!
This quiz contains 12 questions from a mix of 1 subtopics.
What is the role of chlorophyll?
To absorb light energy for photosynthesis
To provide strength to the leaf
To attract bees
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Why may plants produce insufficient chlorophyll?
(Select all that apply)
They lack the required nutrients
They grow too tall
They don't have enough oxygen
They have a disease like Tobacco Mosaic Virus
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In addition to the amount of chlorophyll that a plant has, there are three environmental factors that affect the rate of photosynthesis. List them below.
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Given the shape of the graph above, which variable(s) could be on the x axis?
(Select all that apply)
Carbon dioxide concentration
Oxygen concentration
Light intensity
Temperature
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Using what you know about how different factors affect the rate of photosynthesis, which factor would give the above graph?
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What is limiting the rate of photosynthesis at the point labelled in the graph?
Carbon dioxide concentration
Temperature
Light intensity
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When a graph levels off like this we say that it has:
Stopped
Reached equilibrium
Plateaued
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At the point indicated on the graph above, what could be limiting the rate of photosynthesis?
(Select all that apply)
Carbon dioxide concentration
Light intensity
Temperature
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Describe and explain how the rate of photosynthesis varies with temperature.
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sunlight / lamps / greenhouses / pests / thieves / fertilisers
Farmers in cooler climates often use . These help trap the heat energy from , and so increase the temperature. They also keep out which could otherwise damage the plants.
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How can farmers ensure that photosynthesis takes place 24 hours a day?
Use paraffin heaters
Use greenhouses
Use artificial lighting
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Paraffin heaters have two benefits. As the paraffin (a type of fuel) is burned it releases lots of heat, and also lots of:
carbon dioxide
oxygen
light
pesticides
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