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

What event marks the beginning of the menstrual cycle, What event marks the...

What event marks the beginning of the menstrual cycle? What is the blood concentration of FSH, LH, estrogen and progesterone in this phase of the cycle? By convention the menst

Define the energy cost of growth, Define the Energy Cost of Growth? The...

Define the Energy Cost of Growth? The energy cost of growth has two components: 1) The energy needed to synthesize growing tissues; and 2) The energy deposited in these tis

Different stages involved in feeding patient - peptic ulcer, Q. Different s...

Q. Different stages involved in feeding patient - peptic ulcer? Stage I: It is characterized by haematemesis (vomiting of blood which may be derived from mouth, stomach, oesoph

Somatic embryogenesis, Somatic Embryogenesis The process of embryo de...

Somatic Embryogenesis The process of embryo development is called embryogenesis. It is not the monopoly of the egg to form an embryo. Any cell of the female gametophyte (Embr

In which bones can bone marrow chiefly be found, In which bones can bone ma...

In which bones can bone marrow chiefly be found? Is the bone marrow made of osseous tissue? Bone marrow can mostly be found in the internal cavities of flat bones, as the verte

Potential and excitation threshold for neurons, Q. How different are the co...

Q. How different are the concepts of action potential, resting potential and excitation threshold concerning neurons? Action potential is the maximum positive voltage level ach

What is the cell theory, Cell theory is a theory that asserts that the cell...

Cell theory is a theory that asserts that the cell is the ingredient unit of the living beings. Before the discovery of the cell, it was not examined that the living beings were

Difference between diabetes mellitus and diabetes insipidus, Q. What is the...

Q. What is the difference between diabetes mellitus and diabetes insipidus? What are the characteristic signs of diabetes insipidus? Diabetes mellitus is the disease caused by

Is a viral infection treated with drug, Q. Is a viral infection treated wit...

Q. Is a viral infection treated with the same kind of drug that treats bacterial infections? The Antibacterial drugs, potent against a great variety of bacteria, are not effect

Evolution and scope of dental implantology, The need to replace missing tee...

The need to replace missing teeth has haunted humans for time immemorial. Since antiquity man has attempted to solve the problems associated with failing dentition. The goal of mod

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