DP Biology (first assessment 2025)

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Question 20N.1A.SL.TZ0.12

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1A.SL.TZ0.12
Level SL Paper 1A Time zone TZ0
Command term Question number 12 Adapted from N/A
12.
[Maximum mark: 1]
20N.1A.SL.TZ0.12

Plants produce carbon dioxide in respiration and use carbon dioxide in photosynthesis. The graph shows the volume of carbon dioxide exchanged in a plant at different light intensities.

 

What is shown by the graph?

A. There is no photosynthesis between W and X.

B. There is no photosynthesis between Y and Z.

C. There is more respiration than photosynthesis between Y and Z.

D. There is more respiration than photosynthesis between W and X.

[1]

Markscheme

D

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