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 the way of life of sponges, Q What is the way of life of sponges? ...

Q What is the way of life of sponges? Sponges live exclusively in an aquatic environment and they are attached by their base to a substrate fixation ground. Sponges are filteri

Sample titration for determination of iodine number of lipid, Define Sample...

Define Sample titration for Determination of the Iodine Number of Lipids? With a clean dry pipette, accurately measure 0.3 mL of oil into a clean and dry iodination flask (Dupl

Define the bacillus cereus, Define the Bacillus cereus Bacillus cereus ...

Define the Bacillus cereus Bacillus cereus is not a common cause of food poisoning. It is a Gram positive, aerobic, spore forming rod shaped bacteria normally present in soil,

What is cell theory, What is cell theory? Cell theory declares that the...

What is cell theory? Cell theory declares that the cell is the constituent unit of living beings. Before the discovery of the cell, it was not identified that living beings

Explain pulmonary atresia with intact ventricular septum, Explain Pulmonary...

Explain Pulmonary Atresia With Intact Ventricular Septum ? The direct communications between RV and PA is absent. The PDA is major source of blood flow to lungs From Aorta. The

Blood plasma - circulation, Blood Plasma - Circulation Centrifugation...

Blood Plasma - Circulation Centrifugation of blood results in its separation into two portions - a packed mass of cells which constitute around 45 per cent of the volume of t

Explain phylum sarcdina, Phylum Sarcdina 1) They move by means of pseud...

Phylum Sarcdina 1) They move by means of pseudopodia (ralse feet) or similar structures. 2) They feed heterotrophically by phagocytosis.   Some examples: Amoeba, Entamo

Hearing equilibrium, EQUILIBRIU M - Cristae and maculae are concerned ...

EQUILIBRIU M - Cristae and maculae are concerned with equilibrium. 1 .       DYNAMIC EQUILIBRIUM - Cristare detect turning or rotational movement of head ( angular ac

What is the goal of risk assessment, What  is  the  goal  of  risk ass...

What  is  the  goal  of  risk assessment? The goal of risk assessment is to provide risk managers, who might be, for example, government regulatory officials, industry health a

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