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LeonBan LeonBan
wrote...
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11 years ago
through the stomata

 through the roots

 through the stigma

 none of the above
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wrote...
11 years ago
Stomata.

Stomata are the sites, usually on the underside of a leaf, where gas exchange occurs.
wrote...
11 years ago
through the stomata.

By diffusion down its concentration gradient - high in the air and low in the air spaces of the spongy mesophyll.
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