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

How would you perform abo blood grouping, Question 1 How would you perform...

Question 1 How would you perform ABO blood grouping? Add a note on advantages and disadvantages of each method. Also discuss the precautions you may take to avoid errors in variou

What is its function of pylorus, Q. What is the valve that separates the du...

Q. What is the valve that separates the duodenum from the stomach called? What is its function? The valve that separates the stomach from the duodenum is the pylorus it has the

Tree, what is a seed?

what is a seed?

Sympathetic and para sympathetic nervous system, SYM P A THETI C NERVOU...

SYM P A THETI C NERVOUS SYSTEM These sympathetic chain are connected with ramus comminicause of thoracic & lumber part. Due to this reason this system is called as t

Explain the physiology of lactation, Explain the Physiology of Lactation? ...

Explain the Physiology of Lactation? Lactogenesis is the onset of copious milk secretion around parturition, triggered by a fall in plasma progesterone levels. Although some co

Cytoplasmic reorganisation, Cytoplasmic Reorganisation Meiosis is also...

Cytoplasmic Reorganisation Meiosis is also associated with major reorganisation of the cytoplasm of MMCs and microspores. Microspore mother cell shows high metabolic activity.

Define assessment of selenium status, Define Assessment of Selenium Status?...

Define Assessment of Selenium Status? Blood glutathione (GSH) peroxidase activity is directly related to blood selenium up to a level of 1.27 μmoles/L. Beyond this point, the a

Determine the modification of food starches, Modification of Food Starches ...

Modification of Food Starches Positive attributes of starches can be greatly improved and/or negative characteristics diminished by slight and relatively simple modifications.

draw the cell at metaphase, Consider cell with a diploid chromosome number...

Consider cell with a diploid chromosome number of 4 (2n=4), one pair of the chromosomes is metacentric,the other is acrocentric. The metacentric is labeled a 1 a 1 while the acr

Explain creaming volume formulae - performance evaluation, Performance Eval...

Performance Evaluation Cake batter aeration can be affected by the plasticity, consistency, emulsification, bake stock formulation and other fats and oil properties.  Creamin

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