6 (a) The photographs show three species of lichen - Edexcel - GCSE Biology - Question 6 - 2013 - Paper 1
Question 6
6 (a) The photographs show three species of lichen.
Each species can tolerate different concentrations of pollutants present in the air.
species 1
tolerant to ox... show full transcript
Worked Solution & Example Answer:6 (a) The photographs show three species of lichen - Edexcel - GCSE Biology - Question 6 - 2013 - Paper 1
Step 1
Complete the sentence by putting a cross (❌) in the box next to your answer.
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Answer
Lichens are examples of A living indicators. This is because they are sensitive to pollution levels and can indicate the presence of certain pollutants in the environment.
Step 2
Explain which one of these species is most likely to be found near a coal-burning power station.
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Answer
Species 1, which is tolerant to oxides of nitrogen, is most likely to be found near a coal-burning power station. This is due to the emissions from coal burning, which typically contain higher levels of nitrogen oxides. Over time, species like this adapt to endure such pollutants, making them prominent in polluted environments.
