Plant KingdomHard
Question
Which one of the following is heterosporous ?
Options
A.Dryopteris
B.Salvinia
C.Adiantum
D.Equisetum
Solution
Heterospory is the production of spores of two different sizes and two different developmental patterns. Small spores called microspores and lareger as megaspore. Microspores germinate to produce the male gametophyte or microgametophyte the bear male sex organs while, megaspore germinates to form female gametophyte or megagametophyte thet bears archegonia or female sex development in the vascular plants because it has ultimately lead to seed development, eg, Selaginella, Marselia, Salvinia, Azolla, Isotes.
Dryopteris is homosporous and 3264 haploid spores are produced in each sporangium.
Adiantum is also homosporous. The spores are the pioneer structures of the gametophytic generation.
Dryopteris is homosporous and 3264 haploid spores are produced in each sporangium.
Adiantum is also homosporous. The spores are the pioneer structures of the gametophytic generation.
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