IGCSE Biology Past Papers: Coordination & Hormones
Nerves, reflex arc, hormones, and homeostasis (blood glucose, temperature) recur in Edexcel IGCSE biology past papers. Draw and label reflex diagrams from past mark schemes. Hub: biology past papers.
Frequently asked questions
Negative feedback loops?
Explain with because/so — common 4–6 mark item.
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