Dictionary » E » Embryo sac

Embryo sac

Large oval cell in nucellus of ovule, in which fertilization of the egg cell and development of the embryo take place.

 embryo sac

(Science: botany) see embryonic.

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Re: sporophytic haploids....is it true?

... male gametophyte is the pollen grain and the female gametophyte is the embryo sac. However, parthenogenetic development of unfertilized eggs can occur, but it is very rare. ...

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by sara135
Tue Jul 12, 2011 8:23 am
Forum: Botany Discussion
Topic: sporophytic haploids....is it true?
Replies: 6
Views: 8726

what does exactly produce egg cell?

... membranes partition into a multicellular female gametophyte --- the embryo sac. So egg cell should be created by megaspore? But in the book says that embryo sac produces ...

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by scienceclub
Fri May 21, 2010 5:58 am
Forum: Botany Discussion
Topic: what does exactly produce egg cell?
Replies: 4
Views: 3499

8 Nucleated (7 celled) Embryo sac - Help

... out there knew of a good, step-by-step guide on how the 7 celled embryo sac is formed. I am being told that a lot of detail will be required for my first exam, and ...

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by chemex
Tue May 18, 2010 12:37 am
Forum: Botany Discussion
Topic: 8 Nucleated (7 celled) Embryo sac - Help
Replies: 1
Views: 2017

help with some questions

... a diploid nutrient tissue -a triploid zygote is formed -both a diploid embryo and triploid endosperm are formed -two embryos develop in every seed ... plants? -ovule -microspore mother cell -pollen grain -embryo sac -fertilized egg thanks!

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by nile_opeth
Thu May 03, 2007 12:56 am
Forum: Botany Discussion
Topic: help with some questions
Replies: 2
Views: 2300

Extraembryonic Membranes

does anyone know exactly how the four membranes amnion yolk sac chorion, and allantois work to protect the embryo and egg?

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by vlc1500
Wed Mar 07, 2007 1:32 am
Forum: Zoology Discussion
Topic: Extraembryonic Membranes
Replies: 6
Views: 8785
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