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

Descriibe mechanical ventilation and cardiac performance, Descriibe Mechani...

Descriibe Mechanical Ventilation and Cardiac Performance During spontaneous breathing, the intrathoracic and intrapulmonary pressures are negative, while with mechanical venti

Circulatory system transports gases, Q. What are the three kinds of respira...

Q. What are the three kinds of respiration in which the circulatory system transports gases? The circulatory system has an important role in branchial respiration, cutaneous re

Draw the relationship between jp and v, Given the cell described in Figure ...

Given the cell described in Figure 7.7 with a=100mM, Pk=1.0, and PNa=0.04, at steady state, plot the relationship between Jp and V.

Explain the four initial stages of the embryonic development, What are the ...

What are the four initial stages of the embryonic development? The four initial parts of the embryonic development are the morula stage, the blastula stage, the gastrula stage

Define the role of protein and purines, Q. Define the Role of Protein and P...

Q. Define the Role of Protein and Purines? Cellular materials of plants, grams and legumes and animal glandular organ meats (liver, pancreas brain, kidneys) contain nucleoprote

Explain the recommended dietary allowances - nutrition, Explain the Recomme...

Explain the Recommended Dietary Allowances - Nutrition? The recommended dietary allowances are defined as the 'daily dietary intake level that is sufficient to meet the nutrien

Psychology, Which theory focuses on how people are different than animals? ...

Which theory focuses on how people are different than animals? Functionalism Eclecticism Humanism Behaviorism

Define precautions for estimation of vitamin c in chillies, Define Precauti...

Define Precautions for Estimation of Vitamin c in Chillies? 1. Rinse all glassware with 3% metaphosphoric acid before you begin your practical and subsequently each time you wa

Phylum annelida, describe the diversity in the feeding habits and locomotio...

describe the diversity in the feeding habits and locomotion of annelids

Signs and symptoms of hypoglycaemia, Q. Signs and Symptoms of Hypoglycaemia...

Q. Signs and Symptoms of Hypoglycaemia? Let us now learn about signs and symptoms of hypoglycaemia. It is important for you know these because you can help the patient and fami

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