When do the stomata open?

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(A) Stomata are specialized pores found in the epidermis of leaves and other green parts of plants. They play a crucial role in gaseous exchange ($CO_

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For gaseous exchange during the daytime

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(A) Stomata are specialized pores found in the epidermis of leaves and other green parts of plants. They play a crucial role in gaseous exchange ($CO_2$ and $O_2$) and transpiration. In most plants,stomata open during the daytime to facilitate the uptake of $CO_2$ required for photosynthesis and to release $O_2$ produced as a byproduct. This opening is regulated by the turgor pressure of guard cells.

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