What are stomata? where they are normally found in a leaf?

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stomata are the tiny pores found in the surface of  the leaves
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Palak is right
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stomata are the small tiny pores in the leaves of a plant which helps the plant to make their food.
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They are normally found in the leaves because its the suitable place to absorb sunlight.
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In Class IX, we had talked about stomata which are tiny pores present on the surface of the leaves. Massive amount of gaseous exchange takes place in the leaves through these pores for the purpose of photosynthesis. But it is important to note here that exchange of gases occurs across the surface of stems, roots and leaves as well. Since large amounts of water can also be lost through these stomata, the plant
 closes these pores when it does not need carbon dioxide for photosynthesis. The opening and closing of the pore is a function of the guard cells. The guard cells swell when water flows into them, causing the stomatal pore to open. Similarly the por​closes if the guard cells shrink.

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