Name the three group of plants that bear archegonia.Briefly describe the life cycle of any one of them.

Name the group of plants that bear fruits___________.

Carbon has many allotropes. Briefly explain the structure of any one of the allotrope.

Pick out the correct pairs of plant groups which bearing archegonium

Name the plant group in which 'protonema' is present.

heterospory i.e formation of two types of spores- microspores and megaspoores is characteristic features in the life cycle of a few members of pteridophytes and all spermatophytes. do you think heterospory has some evolutionary significance in plant Kingdom.

Energy generation in stars is due to nuclear fusion. Three types of radio active decay occur in nature. Briefly describe them.

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?