By blocking carbon dioxide from penetrating the leaf, they slow down photosynthesis.
Leaf stoma are holes that can be found. Gases can enter and exit the leaves through these openings. Two highly specialized epidermis cells develop into the stoma. Only these guard cells, which are also known as epidermis cells, have chloroplasts.
The roots of plants draw water from the soil. They transpire, or expel water vapor into the atmosphere, through the countless tiny openings (known as stomata) on the underside of their leaves.
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