--%>
Assignment Help - homework help

Trends of gametophyte in evolution of plants

Write down the trends of gametophyte in evolution of the plants?

E

Expert

Verified

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.

   Related Questions in Biology

  • Q : Biotic potential of viral population

    How different is growth according to biotic potential of a viral population from growth according to biotic potential of bacterial population?

    		•
  • Q : Chemical bonds of the DNA molecule Name

    Name the chemical bonds of the DNA molecule which are broken for the replication procedure to take place?

    		•
  • Q : Define Project Lifecycle Project

    Project Lifecycle: It is a seven stage process via which practically every major project goes via: (A) Identification: stage where one project-idea out of a number of alternatives is selected and stated. (B) Preparation: stated idea is cautiously deve

    		•
  • Q : Define Sales Cycle Management Sales

    Sales Cycle Management: The sales cycle is the order of phases that a classical customer goes through while deciding to buy something. Like a rule, the sales cycle is illustrated from the customer's perspective. The initial phase of the sales cycle ma

    		•
  • Q : Star fish and sea urchin To what order

    To what order does each of the echinoderm species Star fish and sea urchin belong? Describe why they are classified under that order.

    		•
  • Q : Name of the larva of corals and sea

    What is the name of the larva of corals and sea anemones? What is the biological importance of that larval stage?

    		•
  • Q : Are mollusk metameric living beings Are

    Are mollusk metameric living beings? Completely analyzing this aspect could it be said that molluscs are evolutionarily proximal to the nematodes or to the annelids?

    		•
  • Q : Oxygen supply-aerobic cellular

    What occurs when oxygen supply is inadequate to maintain aerobic cellular respiration throughout muscle exercise?

    		•
  • Q : Define Marketing Management Marketing

    Marketing Management: It is one of the main management disciplines, encompassing all strategic planning, activities, operations, and processes included in attaining organizational objectives by delivering the value to customers. Marketing management f

    		•
  • Q : What is tuberculosis What is

    What is tuberculosis? What are their symptoms.

    		•