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

Dissolved gases and alkalinity, Dissolved Gases and Alkalinity Disso...

Dissolved Gases and Alkalinity Dissolved Gases The marine environment serves as a gigantic reservoir of dissolved oxygen and carbon dioxide, which respectively help reg

Explain about iceberg phenomenon, Q. Explain about Iceberg Phenomenon? ...

Q. Explain about Iceberg Phenomenon? Phenomenon means a fact or occurrence that appears. Let us see how iceberg phenomenon is applied to Diabetes Mellitus (DM). Cases of dia

Is diabetes causes the cardiovascular disease, Q. Is Diabetes causes the ca...

Q. Is Diabetes causes the cardiovascular disease? Diabetes: Sustained hyperglycemia is associated with tissue damage and cardio- myopathies. You shall study about diabetes and

What are compound eyes, What are compound eyes? Arthropods have compoun...

What are compound eyes? Arthropods have compound eyes made of many visual units called ommatidia. Every ommatidium transmits visual information by the optic nerve to the brain,

What is active transport , The active transport of molecules requires a...

The active transport of molecules requires an input of metabolic energy and this can  be  derived  either  from  direct  coupling  to  the  hydrolysis  of  ATP  or  by coupling to

Discuss about intracellular perfusion fluid, At 1 AM, a healthy squid giant...

At 1 AM, a healthy squid giant axon is placed in a bath of normal squid physiological extracellular saline and is internally perfused with normal squid intracellular saline.  I

Define about anthropometric and physiological, Define about Anthropometric ...

Define about Anthropometric and Physiological? Various physiological and anthropometric measurements give us an indication of the present status of an individual based on which

Explain about the simple proteins, Explain about the Simple Proteins? S...

Explain about the Simple Proteins? Simple proteins are those that are made of amino acid units just joined by peptide bond. Upon hydrolysis they yield a mixture of amino acids

How do you prevent food borne infection, How do you prevent food borne infe...

How do you prevent food borne infection? Prevention of Food borne infections: Avoid consumption of contaminated foods and water Eat properly cooked foods Wash

Difference between essential and natural amino acids, What is the differenc...

What is the difference between essential and natural amino acids? Ans) Significant amino acids are those that the organism is not able to synthesize and that require to be inges

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