gas exchange in plants
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Last updated 5:06 PM on 4/3/26
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4 Terms
1
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Role of diffusion in plant gas exchange
CO₂ diffuses into leaf for photosynthesis
O₂ diffuses out
opposite occurs during respiration
2
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Leaf adaptations for gas exchange
large surface area
thin structure
air spaces in spongy mesophyll
stomata present
3
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Role of stomata
Pores controlled by guard cells:
open → gas exchange occurs
close → reduce water loss
4
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Gas exchange day vs night
Day:
photosynthesis > respiration
net CO₂ enters
Night:
respiration only
O₂ enters, CO₂ leaves
