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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 b... 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
Complete the sentence by putting a cross (X) in the box next to your answer.
Answer
The build-up of nutrients in an aquatic environment is known as B eutrophication. Eutrophication is the process where water bodies receive excess nutrients, primarily phosphorus and nitrogen, leading to excessive growth of algae and plants.
Step 2
Suggest how farming can lead to a build-up of nutrients in the lake.
Answer
Farming can lead to a build-up of nutrients in the lake through practices such as:
- Overuse of nitrates or phosphates fertilizers, which can runoff into water bodies.
- Leaching of fertilizers into the lake as rainwater washes them away.
Step 3