The ferns in which the entire sporangium deve | vedclass

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(A) In $Leptosporangiate$ ferns,the entire sporangium develops from a single superficial initial cell.This initial cell divides periclinally into an o

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Leptosporangiate

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(A) In $Leptosporangiate$ ferns,the entire sporangium develops from a single superficial initial cell.This initial cell divides periclinally into an outer and an inner component.The inner cell forms the stalk,while the outer cell gives rise to the sporangium proper.This type of development is characteristic of most modern ferns (e.g.,$Polypodiaceae$).

The ferns in which the entire sporangium develops from a single superficial cell of the sporophyll are known as

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