Formation of gametophyte directly from s...

Formation of gametophyte directly from sporophyte without meiosis is

Apospory

Apogamy

Parthenogenesis

Amphimixis.

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Assertion: Polyploidy is very common in the member of Filicophyta. Reason: It is due to the development of gametophytes directly from sporophyte without meiospore formation.

Match the following {:(,"Column I",, "Column II"),((a),"Coleorhiza",(i),"Development of sporophyte directly from gametophyte without intervention of gametes"),((b),"Apogamy",(ii),"Development of gametophyte directly from sporophyte without the involvement of reduction division"),((c),"Indusim",(iii),"An unbranched columnar stem with a crown of leaves"),((d),"Caudex",(iv),"Protective covering of radicle"),(,,(v),"Protective structure of a sorus"):}

Development of female gametophyte directly from megaspore mother cell without meiosis is called

Gametophyte embeded in sporophyte in :-

(I) The formation of microspore from microspore mother cells by meiosis is called ........a ....... (II) Formation of megaspore from megaspore mother cell by meiosis is called .......b........... (III ) The formation of male gamete from generative cell by mitosis is called ...........c....... (IV ) The formation of a zygote by the fusion of male and female gametes is called ......... d......... Write correct terms for a, b, c and d.

Development of a sporophyte directly from the gametophytic tissue is called

Prothallus (gametophyte) gives rise to fern plant (sporophyte) without fertilisation. It is

Formation of embryo directly from nucellus and integument is

Riccia gametophyte develops from spore and ends in

In Marchantia , gametophyte starts from spore and ends in

DINESH PUBLICATION ENGLISH-NO IDEA-Brain Teasers

Formation of gametophyte directly from sporophyte without meiosis is
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A structure present in the ovule as well as eggs of birds is
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A plant in which fertilization occurs after the shedding of seed is
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In ovule, exostome is
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Group of specialized thickened nucellar cells between embryo sac and c...
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Hypostase is meant for providing
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A group of specialised nucellar cells between embryo sac and micropyle...
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Sasa paniculata contains a large number of antipodal cells. The number...
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Which one develops from funicle of base of ovule? (a) Sarcotesta (b) ...
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Which one develops from exostome
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In tenuinucellate ovules, the nucellus may break down. The nourishment...
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Endothelium develops from (a) Nucellus (b) Nucellus surrounding embr...
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Middle layers of pollen sac wall are absent in
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Growth of pollen tube is
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The apical growing region of pollen tube is called
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Functional part of pollen tube is separated from the rest by
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Pollen tube cytoplasm is like any other living cell in showing (a) Cal...
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Male nucleus fuses with female nucleus during fertilization in Angiosp...
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Which one is true of male gamete of angiosperms
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Heterofertilization is
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