DP Biology (first assessment 2025)

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Question 23M.2.SL.TZ2.a

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Date May 2023 Marks available [Maximum mark: 3] Reference code 23M.2.SL.TZ2.a
Level SL Paper 2 Time zone TZ2
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 3]
23M.2.SL.TZ2.a

Outline the effect of nitrogen compounds from agricultural land leaching into a lake.

[3]

Markscheme
  1. excess nutrients/eutrophication;
  2. excessive growth of algae/algal blooms;
  3. blocking of sun prevents photosynthesis;
  4. increased decomposition of algae/organisms;
  5. increased biochemical oxygen demand/BOD;
  6. other organisms/fish die due to lack of oxygen;

Syllabus sections