Question

A well developed archegonium with neck consisting of 4-6 rows and neck canal cells, characterises (a)...

A well developed archegonium with neck consisting of 4-6 rows and neck canal cells, characterises

(a) gymnosperms and flowering plants

(b) pteridophytes and gymnosperms

(c) gymnosperms only

(d) bryophytes and pteridophytes.

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Answer #1

(d) bryophytes and pteridophytes

Bryophytes and pteridophytes each have alternation of generation. The gametophytic phase is dominant in bryophytes while in pteridophytes it's far short lived. intercourse organs are embedded is a few members of bryophytes and pteridophytes. Sperms are flagellate and so water is required for fertilization. Sterile jacket is present around the intercourse organs for safety. Archegonium regarded for the first time in bryophytes in plant state.

it has a flask fashioned shape. It has swollen basal component known as venter and higher elongated neck. The venter has egg cellular and venter canal mobile. There are 4-6 vertical rows of neck cells enclosing neck canal cells in bryophytes. The archegonia have brief neck fabricated from four rows of vertically elongated cells that encloses four neck canal cells in pteridophytes.

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