Question

How far does selaginella one of the few living members of lycopodiales fall short of seed habit?

Answer 1

Retention of female gametophyte on parents sporophyte for variable duration,

gametophyte can shed in many stages and the last stage in which gametophyte shed is during 'formation of embryo'

Explanation:

adaptation or features require for formation of seed are present in selagenella eventhough it doesn't form seed.

Answer 2

Answer:

hey mate here is your answer....

Explanation:

▶️ Selaginella shows several advances towards the seed habit but falls short of it due to

• Absence of integument like covering around the megasporangium.
• Occurence of thick wall around the functional megaspore and absence of nucleus like tissue to provide nourishment to female gametophyte.
• Absence of receptive organ for catching and nourishing the microspores.
• Requirement of external water for swimming of male gametes.
• Uninterrupted growth of embryo formed in some cases inside the megasporangium.
• Megasporangium containing the embryo is never shed as seed.

Hope it helps!☺️