The middle lamella between plant cells is made mainly of
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Sclerenchyma fibres are strong because they have
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Amyloplasts store
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Magnesium ions are needed by plants to make
Salam Academy Original Practice · Proposed mark scheme
A fibre breaks when 0.60 kg is added. Calculate the breaking force (N), with g = 9.8 N kg⁻¹.
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Breaking masses of 5 fibres: 0.55, 0.60, 0.65, 0.58, 0.62 kg. Calculate the mean (kg).
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Phase 1 clinical trials mainly test
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In a double-blind trial,
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A placebo is used to
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Withering's work with foxglove was important because he
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Plant extracts are tested for antimicrobial activity by
Salam Academy Original Practice · Proposed mark scheme
Plant fibres are considered more sustainable than oil-based plastics because they
Salam Academy Original Practice · Proposed mark scheme