--%>
Assignment Help - homework help

Formation of female gametes of gymnosperms

Explain the formation of the female gametes of gymnosperms and also the relationship between this process and the concept of the alternation of generations?

E

Expert

Verified

In female strobiles (cones) there exist megasporophylls (fertile leaves of the strobile) which consist of megasporangia. In the megasporangium the spore mother cell go through the meiosis producing four haploid cells of which three regress and one provides birth to the functional megaspore. The functional megaspore through the several mitosis forms the female gametophyte which consists of the oospheres or female gametes of the plant. The female gametophyte is situated inside the megasporangium which has a small opening, the micropyle, through which pollen tube penetrates. The process is related to the diplobiontic life cycle (alternation of generations) as the functional megaspore produces the haploid stage of plant (the female gametophyte).

   Related Questions in Biology

  • Q : Define the term circulation Define the

    Define the term circulation? Answer: The Circulation is a movement of substances such as nutrients and gases in blood vessels and cavities all through the organism.<

    		•
  • Q : Employers general duties in risk areas

    What are the Employers general duties in risk areas ?

    		•
  • Q : Acidic flavor of fermented milk To

    To which substance is the acidic flavor of fermented milk due?

    		•
  • Q : Hydrophobic interactions in

    Elucidate in concise about hydrophobic interactions in the antigen-antibody interaction.

    		•
  • Q : How pulmonary ventilation influence the

    How does pulmonary ventilation influence the carbon-dioxide concentration in the blood? What occurs to the carbon-dioxide concentration and to the blood pH whenever the respiratory frequency is either increased or decreased?

    		•
  • Q : What is Turnaround Management

    Turnaround Management: It is a group of administration methods employed by organizations in the financial distress. Professionals in the field are extremely trained and specialize in thecorporate organization and assessment. The primary goal in most t

    		•
  • Q : Are organic solvents similar to benzene

    Are organic solvents similar to benzene and ether polar or non-polar substances?

    		•
  • Q : How female is approachable to copulation

    Noramlly how does a male animal recognize that the female is approachable to copulation?

    		•
  • Q : Cellular nuclei-Pollen tube of

    How many cellular nuclei does the pollen tube of the angiosperms have? What is ploidy of each of the nuclei?

    		•
  • Q : Define Strategic Planning Strategic

    Strategic Planning: It is the procedure by which an organization visualizes its future and develops the essential procedures and operations to attain that future. The fundamental steps of the strategic planning procedure comprise information analysis

    		•