Question

2.
Most primitive vascular plants​

Answer 1

Pteridophytes are primitive vascular plants, commonly known as ferns. Unlike other vascular plants, the life cycle of ferns is split between free-living gametophytes and sporophytes phases. The gametophyte is generally simple in structure, containing egg-producing archegonium and sperm-producing antheridium.

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Answer 2

So many plants have come under the Tracheophytes which include angiosperms, gymnosperms and ferns, and horsetails, etc. - Among those, primitive vascular plants come under the pteridophytes. They are commonly called ferns.