Chapter 13 - Carbon dioxide: a universal substrate

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Lower surface of a tomato leaf showing a 'forest' of epidermal hairs and an abundance of tiny stomata through which plants 'draw some part of their nourishment'! Scale bar = 100 μm (Scanning electron micrograph courtesy Stuart Craig and Celia Miller)

... It is through their leaves that plants ... draw some part of their nourishment from the air...

Stephen Hales, Vegetable Staticks 1727

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