Edexcel IGCSE Biology · Spec 2.21-2.22
The Leaf and Minerals
The structure of a leaf and its adaptations for photosynthesis, plus why plants need magnesium and nitrate ions.
Biology revision video
The Leaf and Minerals
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Spec 2.21-2.22
What you need to know
- Label a leaf cross-section
- Explain how the leaf is adapted for photosynthesis
- Recall why plants need magnesium and nitrate
Active recall
Quick check
Answer each question before opening the answer.
Why do plants need nitrate ions and magnesium ions?
Nitrate — to make amino acids and proteins. Magnesium — to make chlorophyll.
Give two ways a leaf is adapted for photosynthesis.
Any two of: broad and flat for large surface area, thin for short diffusion, many chloroplasts in palisade cells, stomata for gas exchange, network of veins.
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