The evolutionary advanced features of Selagin | vedclass

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(B) $Selaginella$ exhibits several evolutionary advancements that bridge the gap between Pteridophytes and Seed plants. $(a)$ Heterospory (production

Vedclass · Accepted Answer

All except $(f)$ are correct

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(B) $Selaginella$ exhibits several evolutionary advancements that bridge the gap between Pteridophytes and Seed plants. $(a)$ Heterospory (production of two types of spores) is a significant evolutionary step towards the seed habit. $(b)$ Endosporic development of the gametophyte means the gametophyte develops within the spore wall,which is an advanced trait. $(c)$ The gametophyte is highly reduced compared to primitive Pteridophytes. $(d)$ The formation of strobili (cones) is an advanced feature for spore protection and dispersal. $(e)$ Unisexual gametophytes are an evolutionary advancement. $(f)$ Fertilization with the help of water is a primitive trait,not an advanced one,as it keeps the plant dependent on external water sources for reproduction. Therefore,all features except $(f)$ are considered evolutionary advancements.

The evolutionary advanced features of $Selaginella$ are:
$(a)$ Heterospory
$(b)$ Endosporic development of gametophyte
$(c)$ Reduced gametophyte
$(d)$ Localization of sporangium-bearing appendages in strobili
$(e)$ Unisexual gametophytes
$(f)$ Fertilization with the help of water

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The evolutionary advanced features of $Selaginella$ are:$(a)$ Heterospory$(b)$ Endosporic development of gametophyte$(c)$ Reduced gametophyte$(d)$ Localization of sporangium-bearing appendages in strobili$(e)$ Unisexual gametophytes$(f)$ Fertilization with the help of water