Selaginella and Salvinia are examples of plants that exhibit:

Heterospory is the production of

Consider the following statements

I. Hydropterides are only plant among the heterosporous pteridophytes that are leptosporangiate

II. Heterosporous pteridophytes were the first land flora of earth

III. The difference in size between microspore and megaspore in Seleginella kraussiana is 1:200

IV. Female gametophyte of Seleginella mostly have single archenogium

Which of the above statement are correct?

In some pteridophytes, sporophyll form distinct compact structures called ...A… in …B… and …C… Here A, B and C refers to

Which has vascular tissue, produces spores, but does not has seeds?

In Selaginella, trabeculae are the modification of

Which of the following are called vascular cryptogams?

First vascular plant is

Pteridophytes are also known as

From an evolutionary perspective, the retention of the female gametophyte with a developing young embryo on the parent sporophyte offers what primary advantage?

Fern gametophyte shows …… nature.