NCERT Solutions for Chapter: Plant Kingdom, Exercise 3: SHORT ANSWER TYPE QUESTIONS

The male and female reproductive organs of several pteridophytes and gymnosperms are comparable to floral structures of angiosperms. Make an attempt to compare the various reproductive parts of pteridophytes and gymnosperms with reproductive structures of angiosperms.

Heterospory i.e., formation of two types of spores - microspores and megaspores is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Do you think heterospory has some evolutionary significance in plant kingdom?

How far does Selaginella one of the few living members of Lycopodiales (pteridophytes) fall short of seed habit.

Each plant or group of plants has some phylogenetic significance in relation to evolution: Cycas, one of the few living members of gymnosperms is called as the 'relic of past'. Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement?

The heterosporous pteridophytes show certain characteristics, which are precursor to the seed habit in gymnosperms. Explain.

Comment on the lifecycle and nature of a fern prothallus.

How are the male and female gametophytes of pteridophytes and gymnosperms different from each other?

In which plant will you look for mycorrhiza and coralloid roots? Also explain what these terms mean.