DP Biology (first assessment 2025)

Test builder »

Question 21M.1A.SL.TZ2.32

Select a Test
Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.SL.TZ2.32
Level SL Paper 1A Time zone TZ2
Command term Question number 32 Adapted from N/A
32.
[Maximum mark: 1]
21M.1A.SL.TZ2.32

The apparatus in the diagram was used to assess the effects of factors on transpiration rates.

[Source: Republished with permission of Springer-Verlag from Experimentelle Pflanzenphysiologie: Band 2, Peter Schopfer, 1st edition, 1st Jan 1989; permission conveyed through Copyright Clearance Center, Inc.]

 

Which factor would be a controlled variable in an experiment designed to assess the effects of temperature on transpiration rate?

A. The opening and closing of stomata

B. The intensity of light striking the plant

C. The height of the water in the reservoir

D. The evaporation of water from the leaves

[1]

Markscheme

B

Syllabus sections