DP Biology (first assessment 2025)

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

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

Suggest a suitable control for this experiment.

[1]

Markscheme

using the same apparatus without a plant
OR
cover the whole plant with a plastic bag;

Do not accept a controlled variable

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