DP Biology (first assessment 2025)

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Question 22N.2.HL.TZ0.j

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.2.HL.TZ0.j
Level HL Paper 2 Time zone TZ0
Command term Outline Question number j Adapted from N/A
j.
[Maximum mark: 1]
22N.2.HL.TZ0.j

Outline a reason that the path length was standardized.

[1]

Markscheme

compensates for the different distances between entrances and food/OWTTE;
OR
to enable (fair/valid) comparison/OWTTE;

Do not accept unspecific answers such as ‘to be consistent’.

Examiners report

This was another question that tested candidates' ability to express a relatively simple idea clearly, rather than having to understand a more complicated idea. The key part of the answer was that standardizing path lengths allowed results to be compared to find the effect of the intended independent variable, by cancelling out another variable.

Syllabus sections