DP Biology (first assessment 2025)

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Question 20N.1B.SL.TZ0.b

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1B.SL.TZ0.b
Level SL Paper 1B Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 1]
20N.1B.SL.TZ0.b

Outline how the carbon dioxide could be removed from the water used to irrigate the plant.

[1]

Markscheme

a. boiling (and cooling) the water;

b. expose the water to a vacuum;

Allow distillation of water.

Examiners report

There were many suggestions on how carbon dioxide could be removed from water despite boiling the water being an assessment statement.

Syllabus sections