How are the female gametes of gymnosperms formed, Biology

Assignment Help:

Q. How are the female gametes of gymnosperms formed? What is the relationship between this process and the concept of alternation of generations?

In the female strobiles (cones) there are megasporophylls (fertile leaves of the strobile) that restrain megasporangia. In the megasporangium the spore mother cell undergoes meiosis generating four haploid cells of which three revert and one gives birth to the functional megaspore. The functional megaspore by several mitosis forms the female gametophyte that restrain the oospheres (female gametes) of the plant. The female gametophyte is located within the megasporangium that has the micropyle, a tiny opening, all through which the pollen tube enters.

The procedure is related to the diplobiontic life cycle (alternation of generations) since the efficient megaspore generates the haploid stage of the plant (the female gametophyte).


Related Discussions:- How are the female gametes of gymnosperms formed

Who was charles darwin, Who was Charles Darwin? The Charles Darwin was ...

Who was Charles Darwin? The Charles Darwin was an English naturalist born in 1809 and considered the father of the theory of evolution. By the end of the year 1831, before turn

What are good pharmacovigilance process, Question 1: What are Good Phar...

Question 1: What are Good Pharmacovigilance Process and Good Post-Marketing Surveillance Process? How do they differ from each other? Define and illustrate briefly Good Post

Chemistry of living matter, Chemistry of Living Matter All living things ...

Chemistry of Living Matter All living things including ourselves, are made of protoplasm. Protoplasm is essentiallya colloidal suspension of proteins in a w&ery solution. It is c

Short-term and long-term effects of forest destruction, List the short-term...

List the short-term and long-term effects of forest destruction  (a) on hillsides, (b) in the tropics.  (a) Deforestation on hillsides exposes the soil to erosion by rain and l

State the objectives of neuropsychological assessment, State the goals of N...

State the goals of Neuropsychological assessment Neuropsychological assessment therefore has twin goals. i) The first goal is to recognize the disrupted psychological compo

Explain the electron microscopy in taxonomy, Explain the Electron Microscop...

Explain the Electron Microscopy In Taxonomy? Morphological features that are easily observable with the naked eyes or with the stereomicroscopes permit quick identification an

Amoeba, AMOEBA Systematic  Position Amoeba  was discovered by  Rus...

AMOEBA Systematic  Position Amoeba  was discovered by  Russel von Rosenhoff in  1755. He  called it the little proteus  after the mythical  sea god who is believed to be c

Define procedure for testing the presence of sugar in milk, Define Procedur...

Define Procedure for Testing the Presence of Sugar in Milk? 1. Take 0.1 ml of milk sample in a test tube. 2. Add 0.2 ml of resorcinol solution (0.05 gm of resorcinol in 100

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