O-LevelBiologyRespiration5090/12 · Oct/Nov 2014 · Q171 Mark
Scientists believe that absorption of mineral ions in plants requires energy from respiration. Which observation best supports this idea?
ACarbohydrate is stored in the roots.
BLiving roots give off carbon dioxide.
CThe root hairs have a large surface area.
DUptake of nitrate is reduced in lower oxygen concentrations.
✓ Correct answer
D: Uptake of nitrate is reduced in lower oxygen concentrations.
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