Most primitive living vascular plants are

Give scientific reasons: In pteridophytes,the development of the zygote inside the female gametophyte is considered an important phase.

In some of the pteridophytes and gymnosperms,the sporophylls aggregate at the apices of the main stem or its branches to form definite compact structures. These compact structures are called:

What is required for fertilization in the plant shown in the given figure?

The circinate venation is the characteristic feature of ferns. It refers to

Spore-bearing tracheophytes are known as: