DP Biology (first assessment 2025)

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Question 19M.1B.SL.TZ2.a

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1B.SL.TZ2.a
Level SL Paper 1B Time zone TZ2
Command term State Question number a Adapted from N/A
a.
[Maximum mark: 1]
19M.1B.SL.TZ2.a

State the trend in relative brain mass in primates other than humans according to their time of divergence from humans.

[1]

Markscheme

the longer ago they diverged from humans, the greater the relative brain mass ✔

Accept inverse.

Do not accept negative correlation.

Examiners report

This question concerned how relative brain mass varied in primate evolution. Overall it was not well answered. The decreasing scale on the X-axis caused confusion for a lot of candidates in part (a). 

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