DP Biology (first assessment 2025)

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Question EXEX.1A.HL.TZ0.7

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Date Example questions Example questions Marks available [Maximum mark: 1] Reference code EXEX.1A.HL.TZ0.7
Level HL Paper 1A Time zone TZ0
Command term Question number 7 Adapted from N/A
7.
[Maximum mark: 1]
EXEX.1A.HL.TZ0.7

For what reason do large organisms need specialized gas exchange structures?


A.  They have a large surface area to volume ratio.

B.  There is a short distance to the centre of their body

C.  They have a relatively small surface in contact with the outside

D.  Their skin is impermeable to respiratory gases.

[1]

Markscheme

C

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