DP Biology (first assessment 2025)

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Question 23M.2.SL.TZ2.c

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

Suggest two reasons, other than elevation, for the differences in nitrogen concentration in leaves of pitcher plants.

[2]

Markscheme
  1. pitcher plants consume more insects (at different sampling sites);
  2. larger insects contain more nitrogen;
  3. more nitrogen concentration in soil
    OR
    more nitrifying bacteria in the soil
    OR
    water-logged soil has less nitrogen;
  4. use of N/NPK fertilizers
    OR
    leaching of N in different sites;

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