The sorus of $Dryopteris$ fern is:

Identify the plant shown in the given figure.

Pteridophytes are called vascular cryptogams because they are non-seeded plants containing:

The ferns in which the entire sporangium develops from a single superficial cell of the sporophyll are known as

Read carefully the following statements about sexual reproduction in ferns:
$I.$ Water is essential for fertilization.
$II.$ The male gametophyte bears antheridia,while the female gametophyte bears archegonia,which produce antherozoids and egg cells,respectively.
$III.$ Antherozoids and egg cells fuse to give rise to a zygote. The zygote develops into a young embryo. The embryo gives rise to a sporophyte.
Which of the statements given above are correct?

In fern plants,the ejection of spores with force is achieved by the