DP Biology (first assessment 2025)

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Question 22M.1A.SL.TZ2.20

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1A.SL.TZ2.20
Level SL Paper 1A Time zone TZ2
Command term Question number 20 Adapted from N/A
20.
[Maximum mark: 1]
22M.1A.SL.TZ2.20

Humans have been improving crop species for thousands of years by cross-breeding plants with desirable characteristics. The photograph shows the changes in dry cobs of corn (Zea mays) over 10 000 years.

[Source: Evolution of Maize Cobs © Robert S. Peabody Institute of Archaeology,
Phillips Academy, Andover, Massachusetts. All Rights Reserved.]

 

What is the name of the process that was used to produce modern corn?

A. Selective breeding

B. Adaptive radiation

C. Discontinuous variation

D. Natural selection

[1]

Markscheme

A

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