which one event is not associated with the evolution of seed habit in plants
A.heterospory
B.rentention of megaspore with in megasporangium
C.motility of the gamet
D.none of the thess
Answers
Answer: C. motility of the gamate.
A seed is a ovule that contains an embryo develop after fertilization. Seed habit is the complex evolutionary method of sexual reproduction. It is observed in vascular plants like gymnosperms and angiosperms. Seed plants have an adaptive advantage. Seed habit mainly involves the seed development the intermediary steps include : heterospory, integument development, retention of one megaspore and degeneration of other three and develpment of seed coat.
Which one event is not associated with the evolution of seed habit in plants
A.heterospory
B.rentention of megaspore with in megasporangium
C.motility of the gamet
Ans C.motility of the gamet
Motility provides the means for the motile gamete to reach a distant, sexually compatible but stationary gamete, thereby increasing the probability of syngamy in sexually reproducing individuals of Tabularia who are non-motile in the non-sexual phase of their life cycle.