Biology 9700/23 May June 2022 | Cambridge AS Level Past Papers With Mark Scheme
- Trachea structure, branching airways, gas exchange system, lung entry.
- Blood supply differences, trachea arteries, alveoli arteries, aorta connection.
- Tissue identification, structural features, photomicrograph analysis, trachea section.
- Bacterial vs. plant cell comparison, cell wall composition, organelle function, protoplasts.
- Xerophytic adaptations, leaf structure, waxy cuticle, stomatal features, water conservation.
- COX pathway, arachidonic acid metabolism, enzyme location, anti-inflammatory drug effects.

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