A-LevelBiologyControl and coordinationMay/June 2024Paper 5 Q211 Marks
Gibberellins are a group of plant hormones that are involved in the elongation of plant stems. A student investigated the effect of two different concentrations of a gibberellin, known as GA₃, on stem elongation of 10-day old pea seedlings. The student was given a stock solution of GA₃ with a concentration of 2.85 × 10⁻⁴ moldm⁻³.
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