DP Biology (first assessment 2025)

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Question 20N.1A.SL.TZ0.25

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1A.SL.TZ0.25
Level SL Paper 1A Time zone TZ0
Command term Question number 25 Adapted from N/A
25.
[Maximum mark: 1]
20N.1A.SL.TZ0.25

What feature of arteries is most important in maintaining sufficiently high blood pressure?

A. A wide lumen

B. Elastic fibres in the wall

C. Valves at intervals

D. A thin wall

[1]

Markscheme

B

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