Biology · Oct / Nov 2020 · Paper 12 · Question 3
5090Active transport
An experiment measured the rate at which plants take up magnesium ions from solution. One plant was given a poison that stops respiration. Another plant was left as normal. The graph shows the results. How are the magnesium ions being absorbed by the plants at points N and P?
- Aactive transport / active transport
- Bactive transport / diffusion
- Cdiffusion / active transport
- Ddiffusion / diffusion
As printed in the paper
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Correct answer: B. active transport / diffusion
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