The characteristic feature of the stomata in gymnosperms is that,
(a) they are deeply sunken in pits
(b) there are subsidiary cells
(c) the walls of the guard cells are completely free of lignin.
(d) the walls of the guard cells and subsidiary cells are partly free
of lignin.
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The characteristics feature of the stomata in gymnosperms it that, they are deeply sunken. They are also named as sunken stomata.
Stomata - Stomata are the tiny pores present in the lower epidermis of the leaf.
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