DP Biology (first assessment 2025)

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Question 22M.1A.SL.TZ1.13

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1A.SL.TZ1.13
Level SL Paper 1A Time zone TZ1
Command term Question number 13 Adapted from N/A
13.
[Maximum mark: 1]
22M.1A.SL.TZ1.13

The table shows the estimated total number of genes in several organisms.

What can be deduced from the information in this table?

A. Throughout evolution, the number of genes increases.

B. The domestic dog is more closely genetically related to the fruit fly than to the human.

C. The number of genes does not determine evolutionary success.

D. Humans produce about half as many proteins as rice.

[1]

Markscheme

C

Examiners report

Most candidates chose the anticipated answer — that the number of genes an organism has does not determine whether or not it is evolutionarily successful. Candidates were expected to regard all of organisms in the table as successful, because they still exist today.

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