During fertilization in ferns,the male gamete reaches the female gamete through the agency of:

From an evolutionary point of view,the retention of the female gametophyte with the developing young embryo on the parent sporophyte for some time is first observed in:

Disposal of spores in ferns takes place through

In ferns,young leaves are protected by

Spindle-shaped male gametes are found in:

The first plants to appear after a forest fire are the ferns. This is because of the survival of their: