Make a few diagrams of common pteridophytes.

Draw a few examples of common birds.

Name the four classes of pteridophytes.

Name a few forms of cry gene.

Name a few forms of cry gene.

Make labelled diagram of candle flame.

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 bryophytes differ from pteridophytes.