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

Organisation of the marine ecosystem, Organisation of the Marine Ecosystem ...

Organisation of the Marine Ecosystem The oceans like lakes, exhibit zonations. First describe the various zones or regions of the oceans and then later deal with the biota occ

Explain night blindness - micronutrient deficiencies, Explain Night Blindne...

Explain Night Blindness - micronutrient deficiencies? Night blindness is the earliest symptom of Vitamin 'A' deficiency. The reduction in the supply of vitamin A aldehyde i.e.

Define food behaviour - public nutrition, Define Food Behaviour - Public Nu...

Define Food Behaviour - Public Nutrition? Food is not merely a means to survival but the fuel that drives the human body and the economic engine. What influences what we decide

Antibiotics, ANTIBIOTICS - Chemicals produced by microorganism that ...

ANTIBIOTICS - Chemicals produced by microorganism that inhibit the growth of other microorganism. Such microorganism which produces the antibiotics are antibiont . Wh

Explain about the whey protein concentrates, Explain about the Whey Protein...

Explain about the Whey Protein Concentrates? You already know that whey is the residual liquid substance that is obtained by separating the coagulum from milk during cheesemaki

What is the gas exchange unit of the mammalian lungs, Q. What is the gas ex...

Q. What is the gas exchange unit of the mammalian lungs? The gas exchange units of the mammalian lungs are the alveoli. Q. What is the physical process through which gas ex

Aves, Flighting adaptations in birds

Flighting adaptations in birds

Are bacteria the only prokaryotic beings, Are bacteria the only prokaryotic...

Are bacteria the only prokaryotic beings? Prokaryotic beings are classified into two big groups: archaebacteria and bacteria (this last also known as eubacteria). Compared

State the success which signifies optimum health, Success which signifies O...

Success which signifies Optimum Health The features or clinical conditions which are representative of this group are: i) No pain or tenderness in the implant upon function.

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