Question

the tiny pores on the lower surface of a leaf of known as

Answer 1

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◆ The tiny pores on the lower surface of a leaf is known as Stoma in singular form & in plural form Stomata.

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Answer 2

In botany, a stoma (plural "stomata"), also called a stomata (plural "stomates") (from Greek στόμα, "mouth"), is a pore, found in the epidermis of leaves, stems, and other organs, that facilitates gas exchange