Govt Exams
Gymnosperms are characterized by naked ovules that are not enclosed within an ovary wall. This distinguishes them from angiosperms (which have ovules in ovaries) and pteridophytes (which lack seeds). The term 'gymnosperm' literally means 'naked seed'.
Flowers attract pollinators through various mechanisms (color, scent, nectar) and provide protection to reproductive organs, making sexual reproduction more efficient compared to gymnosperms.
Rhizoids in pteridophytes are hair-like structures that absorb water and minerals, functioning similarly to roots in higher plants.
Bryophytes have a dominant gametophytic generation with a dependent sporophytic generation, unlike other plant groups where the sporophyte is dominant.
A sorus (plural: sori) is a cluster of sporangia arranged on the abaxial surface of fern leaves, often covered by an indusium for protection.
Presence of archegonia, independent dominant gametophyte, and absence of true roots are distinctive features of bryophytes including mosses and liverworts.
The ovule arises as an outgrowth from the placenta (megasporophyll) and projects into the ovary cavity.
The prothallus is the free-living, independent, heart-shaped gametophytic generation in ferns that produces archegonia and antheridia.
Naked ovules (not enclosed in ovary) and cone formation are characteristic features of gymnosperms. Angiosperms have ovules enclosed in the ovary.
The gametophyte generation is always haploid (n) because it develops from spores after meiosis and produces gametes through mitosis.