DP Biology (first assessment 2025)

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Question 22N.2.HL.TZ0.l

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

With reference to all the data, suggest a reason for the difference in standardized mean path length for summer and winter.

[2]

Markscheme
  1. in winter shrews have smaller brains/smaller BCH / converse for summer;
  2. lower/poorer memory/thinking/cognitive skills/learning/intelligence/senses/sense of smell/ability to find food in winter/converse for summer;
Examiners report

The instruction to refer to all the data does not indicate that conclusions from each graph should be restated, but rather than the research findings should be combined to produce a hypothesis. The expected reasoning here was that the lower BCH of shrews in winter showed brain mass was on average lower, so cognitive ability was reduced and shrews were slower to find food.

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