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Dioxide Air Describe Carbon Leaf Reaches Mesophyll Cells

Carbon dioxide enters the leaf via stomata, which are opened by guard cells, diffuses through air spaces, and then into mesophyll cells, maintaining a concentration gradient.

O dióxido de carbono entra na folha através dos estômatos, que são abertos por células-guarda, difunde-se através dos espaços de ar e depois para as células do mesofilo, mantendo um gradiente de concentração.

Front Describe how carbon dioxide in the air outside a leaf reaches mesophyll cells inside the leaf. (3 marks)
Back (Carbon dioxide enters) via stomata;
(Stomata opened by) guard cells;
Diffuses through air spaces;
Allow concentration gradient. Reject along gradient unless direction made clear
Down diffusion gradient;

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