The most primitive members in which roots are not present are:

$A.$ $Nephrolepis$ is a cryptogam.
$R.$ It is a bryophyte.

In which plants are heterosporous conditions found,and what structures do they produce?

Which of the following is a vascular,non-flowering plant?

Apical growth of the lower vascular plants takes place by an apical cell. This cell is generally pyramidal. Though four-sided in shape,it is often referred to as a three-sided cell because

In pteridophytes,the megaspore germinates to form