Embryo-sac, Biology

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

Posted Date: 8/29/2012 6:26:20 AM | Location : United States







Related Discussions:- Embryo-sac, Assignment Help, Ask Question on Embryo-sac, Get Answer, Expert's Help, Embryo-sac Discussions

Write discussion on Embryo-sac
Your posts are moderated
Related Questions
Various acute complications of diabetes mellitus are described in this unit. Acute complications develop within a short period of time. These are due to improper treatment of diabe

Define Classification of functions of minerals?  The varied functions of minerals can be grouped under four general physiologic roles viz. Structural: They form an integ

Fate Maps The details of the procedure of gastrulation are not simple to understand without the knowledge of positions of the cells of the future germinal layers in the blast

Who was Gregor Mendel? The Mendel is considered the father of Genetics. He was a monk, botanist and biologist born in Austria in 1822 and who died in 1884. Throughout the years

Composed of C, H and O (fewer polar OH bonds than carbohydrates) Can be used at energy storage, components of cell membranes, chemical signals & thermal insulation Are

Determine the Food Sources of Fluoride? The major source of fluoride in most diets is water, with foods providing only about 25% of total intake. These include tea and marine f


An impermeable membrane separates one liter of a 0.01 M glucose solution in water in the left compartment from one liter of a 0.1 M glucose solution in water in the right compartme

Vitamin B 6 (Pyridoxine hydrochloride) Pyridoxine hydrochloride is a white, crystalline powder, practically odourless. The dry substance is sufficiently stable in air. With pr

What is an example of an ion of biological importance? Sodium in one, but so are potassium and calcium