What is the advantage of development of seed habits in seed plants?
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Seed habit developed in extinct pteridosperms
Cycadofilicales. It is a group intermediate betw
cycads and ferns. The habit made the seed p
independent of the requirement of external sources
water at the time of fertilisation. In seedless vasculu
plants, the gametophyte must develop on moist soil
a thin sheet of water. The latter is required for
swimming of sperms for reaching the female sex organ,
As a result, seedless vascular plants could never
true land plants. They were popularly called
amphibian of plant kingdom