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Figure 18 shows an investigation into the growth of plant shoots - Edexcel - GCSE Biology - Question 10 - 2018 - Paper 1
Question 10
Figure 18 shows an investigation into the growth of plant shoots. Experiment 1: The tip of a shoot was removed from the plant. There was no growth in the shoot aft... show full transcript
Worked Solution & Example Answer:Figure 18 shows an investigation into the growth of plant shoots - Edexcel - GCSE Biology - Question 10 - 2018 - Paper 1
Step 1
Give one variable that must have been controlled for the plant shoot to grow vertically, as shown in experiment 2.
Answer
One variable that must have been controlled is the direction of light. The light source must be consistent to ensure that all shoots receive equal light intensity, which affects their growth direction.