DP Biology (first assessment 2025)

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Question 23M.1B.SL.TZ1.b

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Date May 2023 Marks available [Maximum mark: 2] Reference code 23M.1B.SL.TZ1.b
Level SL Paper 1B Time zone TZ1
Command term Explain Question number b Adapted from N/A
b.
[Maximum mark: 2]
23M.1B.SL.TZ1.b

Explain the differences in the water loss rate in dark and light conditions.

[2]

Markscheme
  1. more water is lost during the day than at night;
  2. temperature is higher so more loss of water by evaporation;
  3. stomata are open for gas exchange/ photosynthesis (so more water can evaporate/transpire);

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