Trends of gametophyte in evolution of plants
Write down the trends of gametophyte in evolution of the plants?
Expert
A propensity of gametophyte evolution in the plants has been towards formation of gametes which are independent from water. In bryophytes and in pteridophytes the fecundation is totally dependent on water. In phanerogamic plants such dependency doesn’t exist.
Another propensity is reduction in the size and period of gametophyte.
In bryophytes the gametophyte is indeed lasting stage. In pteridophytes, gymnosperms and angiosperms it became temporary stage and its relative size was successively decreased.
A third evolutionary trend relates to interdependency between gametophytes and sporophytes. In bryophytes the sporophyte is entirely dependent on the gametophyte to survive. In the remaining plants sporophyte is the independent stage and once autotrophic gametophyte in bryophytes and pteridophytes became dependent upon the sporophyte in phanerogamic plants.
Write down the main manifestations of the leishmaniasis?
Probability Analysis: Many kinds of probability analysis: A) FMEA, just presented, is one: the “likelihood” of a risk event happening is its “probability” of occurr
How the gymnosperm seeds are formed? What are the ploidies of structures which composed of the seeds?
Which disease cause by dietary iodine deficiency?
What do you mean by diffusion?
This takes place within the organization or group-among people within, among different groups of employees and between employers and employees. It could be oral or written, visual or audio-visual, formal or informal, and upward or downward. Internal communication serves to inform, instruct, educa
Write down the scientific name of etiological agent of the Chagas’ disease?
Using a particular illustration of a time when you misperceived a situation, name and describe how at least three of the guidelines of perception would have helped you in perceiving the situation more accurately.
What key questions you need to have answered in order to reach some sort of reasonable conclusion about the performance gap causes?The following lines list some of the key questions that are required to address the research objectives:
How the circulatory systems participate within the functioning of endocrine system?
18,76,764
1930155 Asked
3,689
Active Tutors
1457662
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!