Question

How many statements are correct with respect to the precursor of seed habit as seen in advanced pteridophytes?

I. Heterosporous conditions.

II. Functional female gametophyte is retained in the megasporangium (ovule) of the sporophyte.

III. Presence of a hard integument covering the ovule.

IV. Embryo undergoes a resting stage.

• A. Only I
• B. Only I & II
• C. I, II, & III
• D. I, II, III & IV

Answer 1

The correct option is B Only I & II

The seed habit is a precursor seen in some advanced pteridophytes. There are only two adaptations in pteridophytes which are:

I. Heterosporous condition in some Pteridophytes. There are two types of spores produced, the megaspore and the microspore.

II. The female gametophyte or the archegonium is retained on the sporophyte i.e. the main plant body.

While all the statements are true with respect to higher plants such as gymnosperms and angiosperms.