DP Biology (first assessment 2025)

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Question 19N.1B.SL.TZ0.1d

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.1B.SL.TZ0.1d
Level SL Paper 1B Time zone TZ0
Command term Explain Question number d Adapted from N/A
d.
[Maximum mark: 2]
19N.1B.SL.TZ0.1d
(d)

Explain one reason for calculating the percentage change in mass.

[2]

Markscheme

a. the change in mass indicates whether the tissue has gained/lost water ✔

b. the pieces of tissue will not be the same mass «at the beginning of the experiment» ✔

c. to compare the relative changes in mass ✔

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