Discussion
Archegonia are absent in the ovule of ...................... .
Answer: D
Archegonia are absent in Gnetum.
In most gymnosperms the female gametophyte inside the ovule bears archegonia, flask-shaped organs that each hold an egg. Gnetum (with Welwitschia) is the exception: its female gametophyte forms no archegonia, and free nuclei in its micropylar part act directly as eggs. This reduction is one of the features that link the Gnetales with the angiosperms.
Cycas, Taxus and Pinus all produce archegonia at the micropylar end of the female gametophyte, so they are the distractors.
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