DP Biology (first assessment 2025)

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Question 22N.2.HL.TZ0.1e

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Date November 2022 Marks available [Maximum mark: 2] Reference code 22N.2.HL.TZ0.1e
Level HL Paper 2 Time zone TZ0
Command term Compare and contrast Question number e Adapted from N/A
e.
[Maximum mark: 2]
22N.2.HL.TZ0.1e
(e)

Compare and contrast the results for winter and spring.

[2]

Markscheme

        Compare part of answer = similarity:

  1. both have low BCH (compared with summer);

    Contrast part of answer:

  2. greater body mass in spring than winter; 
    OR
    overall/mean/average BCH higher in spring than in winter; 
    OR
    more variation in body mass in spring than winter;

For the second alternative in mpb, the answer must not state simply that BCH is higher in spring as there is much overlap. Do not accept quoted figures without the similarity or difference being stated.

Examiners report

This was a 'compare and contrast' question, so similarities and differences were expected in the answer. There were plenty of choices for differences between winter and spring but only one acceptable similarity — that BCH was lower in both winter and spring than in summer. Some answers failed to discriminate between BCH and brain mass — the trends were not the same so these terms were not interchangeable. Some candidates gave a comparison and then repeated it as the converse statement — for example 'sample mass is higher in spring than winter and is lower in winter than spring'. Clearly this is not necessary.

Syllabus sections