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Question 21M.1.HL.TZ1.34

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1.HL.TZ1.34
Level HL Paper 1 Time zone TZ1
Command term Question number 34 Adapted from N/A
34.
[Maximum mark: 1]
21M.1.HL.TZ1.34

Which method can be used to induce short-day plants to flower out of season?

A. Grow them in winter

B. Grow them in summer

C. Expose them to a brief period of light during the night time

D. Cover them with opaque cloth for several hours before sunset

[1]

Markscheme

D

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