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

Valuation of biodiversity, Q. Show the Valuation of Biodiversity? Serio...

Q. Show the Valuation of Biodiversity? Serious research in this field has only been recently initiated and the methodologies for valuation are still evolving. Important valuat

Define risk of stress fracture among athletes, Define risk of stress fractu...

Define risk of stress fracture among Athletes? There is an increased risk of stress fracture among athletes which is associated with lower calcium intake and lower bone density

Define the effects of dietary fibre, Define the Effects of Dietary Fibre? ...

Define the Effects of Dietary Fibre? After reviewing the properties of fibre, we will now study various physiological effects of fibre, as it passes through the gut. The effect

Find which two amino acids make up this pocket, Sickling occurs in deoxyhem...

Sickling occurs in deoxyhemoglobin, but not in oxyhemoglobin. Normal deoxyhemoglobin (HbA and HbS) molecules have a small hydrophobic "pocket" on the surface of a ? chain. In oxyhe

How implant design and surface affect osseointegration, Q. How Implant desi...

Q. How Implant design and surface affect osseointegration? Implant design Most conductive design for osseointegration is root form. They can be threaded, hydroxyapatite co

Treatment and disposal technologies for health-care waste, Q. Treatment and...

Q. Treatment and disposal technologies for health-care waste 1. Incineration 2. Chemical disinfection 3. Wet and dry thermal treatment 4. Microwave irradiation 5. L

Define tests to measure muscular strength and endurance, Define Tests to Me...

Define Tests to Measure Muscular Strength and Endurance? It is important to first understand the difference between muscular strength and endurance. To know the muscular streng

Oxygen cycle, Oxygen is a major component of all living organisms. All the ...

Oxygen is a major component of all living organisms. All the organisms and plants required oxygen for aerobic respiration which they absorb from environment. Only plants release ox

Qualitative changes, Qualitative Changes The qualitative changes in th...

Qualitative Changes The qualitative changes in the structure of proteins in response to stress can lead to the following: Resistance against denaturation of prote

Aschelminthes, in what part of the human body aschelminthes found?

in what part of the human body aschelminthes found?

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