Edexcel Gcse Biology/additional Science - Unit B2: The Components Of Life Foundation Tier Page 5
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(c) Magnesium and nitrates are two mineral ions that
are absorbed by plants.
The table shows the amount of magnesium ions
and nitrate ions in the tips of sunflower and wheat
plants.
MINERAL ION CONTENT /
TyPE OF
ARBITRARy UNITS
PLANT
MAGNESIUM IONS
NITRATE IONS
sunflower
0·730
0·147
wheat
0·225
0·226
(i)
Compare the mineral ion content in the tips of
these two plants. (2 marks)
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