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Botany

Blazing goIITian

Joined:	3 Sep 2008
Post:	485

16 Jan 2009 21:44:04 IST

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146

gametophytic leaves are seen in

None

gametophytic leaves are seen in

mosses

pteridophytes

gymnosperms

spermatophytes xplain

in pteridophytes which of the following are not involved in fertilization

pollen tube

water

flagellated sperms

chemicals

what are flagellated sperms?

heteromorphic alternation of generations is characterstic of

bryophytes

pteridophytes

spermatophytes

all the three

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JPS

Blazing goIITian

Joined: 21 Nov 2008

Posts: 1020

16 Jan 2009 21:53:37 IST

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gametophytic leaves are seen in mosses

e,g. funaria (perigonial and pericheteal leaves)

JPS

Blazing goIITian

Joined: 21 Nov 2008

Posts: 1020

16 Jan 2009 21:56:15 IST

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in pteridphytes pollen tube is not seen as sperms in them are flagellated, i.e. they possess flagella

JPS

Blazing goIITian

Joined: 21 Nov 2008

Posts: 1020

16 Jan 2009 21:58:47 IST

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hw=eteromorphic alternation of generation is that in which the sporophytic and gametophytic gen are morphologically disimilar. this is present in all of the given

N.P. Singh

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Joined: 17 Dec 2008

Posts: 446

20 Jan 2009 13:50:36 IST

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Gametophytic laeves present in Mosses(gametophytes)

Bcoz sperms are flagellated means no requirement of pollen tube

Hetero means different so alternation of gametophytic and then sporophytic phases in pteridophytes is called ......

N.P. Singh

Forum Expert

Joined: 17 Dec 2008

Posts: 446

20 Jan 2009 18:51:20 IST

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Gametophytic laeves present in Mosses(gametophytes)

Bcoz sperms are flagellated means no requirement of pollen tube

Hetero means different so alternation of gametophytic and then sporophytic phases in pteridophytes is called .............

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