Embryo-sac, Biology

Assignment Help:

Embryo-sac :

Embryo-sac is formed from megaspore mother cell.

  1. In embro-sac, there are 7 cells arranged in 3 groups. The 7 cells are one egg (female gamete), 2 synergids, one central cell (secondary nucleus) and 3 antipodals.
  2. All the cells except secondary nucleus are in haploid condition (n) secondary nucleus is diploid (2n)
  3. The synergids are also known as helper cells. These cells direct the growth of pollen tube towards the egg. They have beak like structure and are situated near the micropylar end.
  4. The 3 antipodals live only for a short duration. They are situated near the chalazal end of the embryo-sac.

908_Embryo-sac.png


Related Discussions:- Embryo-sac

What is class polychetae - marine worms, What is Class Polychetae - Marine ...

What is Class Polychetae - Marine Worms? The polychaetes differ from the oligochaetes in several ways. The name itself suggests one of the differences. The prefix "poly" means

Membrane protein purification and reconstitution, The first step of the pur...

The first step of the purification of an integral membrane protein is to disrupt its interactions with other integral proteins and the lipids in the membrane.  This is commonly ach

Genetics, what is a homologous chromosome

what is a homologous chromosome

Recognize the eight stages of meiosis, Can you recognize the eight stages o...

Can you recognize the eight stages of meiosis based on the location and behavior of the chromosomes? Drag the diagrams of the stages of meiosis onto the targets so that the four st

Determine the stability of natural colorants in foods, Stability of Natural...

Stability of Natural Colorants in Foods Many attempts have been made to retain colouration by adding chemicals or modifying processing conditions. Ascorbic acid has been claime

Origin of regeneration cells of blastema, Origin of Regeneration Cells of B...

Origin of Regeneration Cells of Blastema The origin of the cells making the blastema in vertebrates has been investigated by various workers in the case of regenerating legs

Umbilical and inguinal hernia, Umbilical Hernia: An umbilical hernia  ...

Umbilical Hernia: An umbilical hernia  is protrusion of a portion of intestine  through  the umbilical ring (an opening in the muscular area of the abdomen where the umbilical

Respiration, how energy enters and then flows through a biologial system?

how energy enters and then flows through a biologial system?

Homework, why do ecological models commonly have limited applications?

why do ecological models commonly have limited applications?

Economically important fermentation products-beer, Normal 0 fal...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd