The photograph shows a lake which has been polluted by excess nutrients - Edexcel - GCSE Biology - Question 2 - 2012 - Paper 1
Question 2
The photograph shows a lake which has been polluted by excess nutrients.
(a) (i) Complete the sentence by putting a cross (X) in the box next to your answer.
The bu... show full transcript
Worked Solution & Example Answer:The photograph shows a lake which has been polluted by excess nutrients - Edexcel - GCSE Biology - Question 2 - 2012 - Paper 1
Step 1
(i) Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
The correct answer is B: eutrophication. Eutrophication refers to the process by which a body of water becomes overly enriched with nutrients, leading to excessive growth of algae and plants.
Step 2
(ii) Suggest how farming can lead to a build-up of nutrients in the lake.
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Answer
Farming can lead to a build-up of nutrients in the lake through several processes, such as:
The overuse of nitrates and phosphates from fertilizers, which can wash into nearby lakes during rainfall.
Leaching of nutrients into the lake from the soil due to agricultural runoff, particularly after heavy rains.
