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?

A. Heterospory is found in all members of pteropsida B. Selaginella is advance among pteridophytes as it produces seeds C. Pinus leaves are monomorphic , pinnate compound and have sunken stomata as adaptation transpiration D. Sporic meiosis is characteristic of life cycle in many organisms like Volvox , Chlamydomonas and Ulothrix .