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 name of the larval stage of polychaetes, Q. Is the embryonic de...

Q. Is the embryonic development in earthworms indirect or direct? The embryonic development is direct because in earthworms there is no larval stage. Q. What is the name of

Functions of mitochondria, FUNCTION S OF MITOCHONDRIA Cell Oxidation ...

FUNCTION S OF MITOCHONDRIA Cell Oxidation - Mitochondria plays an important role in ATP synthesis during aerobic respiration. Mitochondria are known as Power house of cell b

What are the possible genotypes for its parents, Roan (RW) is a color of ca...

Roan (RW) is a color of cattle in which both red and white hairs are present due to codominance. What are the phenotype and genotype ratios of offspring produced by: roan bull and

Explain neurochemical process, Alertness and sleep are dependent on the act...

Alertness and sleep are dependent on the activity of the brain as a whole, although different levels of consciousness are determined primarily by areas of the brain stem. A key ana

Explain the basic working of cellular functioning, Q Which is the biologica...

Q Which is the biological molecule that holds the genetic information that is transmitted hereditarily and controls the cellular functioning? The hereditary molecule that contr

Explain the assessing and monitoring of peri-implant, Explain the assessing...

Explain the assessing and monitoring of peri-implant The parameters used for assessing and monitoring the peri-implant conditions need to be understood and applied judiciously

Regulatory mechanisms, Normal 0 false false false EN-IN...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain about the asepsis - methods of food processing, Explain about the A...

Explain about the Asepsis - Methods of Food Processing? Food is a living system and it has natural protection mechanisms in its raw agricultural state. Just removed once from t

Action of hormones, Action of Hormones We said earlier that hormones a...

Action of Hormones We said earlier that hormones are released into the blood stream or extracellular fluid and therefore, reach most of the cells of the body. However, they

What are the bone cells, Bone Cells Bone cells may be divided into two ...

Bone Cells Bone cells may be divided into two broad classifications depending on whether they make bone or resorb it. Osteoblasts make bone, while Osteoclasts resorb or take aw

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