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?
Expert
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).
Describe the group of the phylum Chordata which first colonized the terrestrial atmosphere? From which habitat did phylum Chordata come?
Delegation of the authority Meaning & definition: delegation is a process of sharing work and authority between a manager and his subordinates.
Define the term serum sickness?
Explain the embryonic sac? Specify the cells which form the embryonic sac? Specify their ploidies?
Office Automation (OA): The utilizations of computer systems to execute a diversity of office operations, like accounting, word processing, and e-mail. Office automation nearly always implies a network of computers with a diversity of accessible progr
The role of Information System in the organization as primarily serving organizational memory, in my view, IS can serve the other three processes (knowledge acquisition, information distribution, and information interpretation) as well. One instance of use of IS in knowledge acquisition is that o
What is the energy source employed in active transport via biological membranes?
The stage of meiosis where cells become haploid
Give a brief explanation of heterochromatin and euchromatin.
Describe the functions of musculoskeletal system?
18,76,764
1929164 Asked
3,689
Active Tutors
1438797
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!