--%>
Assignment Help - homework help

Types of plant geotropisms

Write down the types of plant geotropisms? Why do root and stem present opposite geotropisms?

E

Expert

Verified

The types of geotropisms are positive geotropism, that in which the plant grows for the gravitational force, as for instance in roots, and the negative geotropism, which against the gravitational force, for instance, in stem. Stem geotropism and Root geotropism are opposed because of different sensitivities to auxin concentration in these structures. The following experiment can demonstrate phenomenon: Root and Stem are placed in a horizontal position (parallel to ground) and naturally auxins concentrate along with their bottom part.

Under this situation it is observed that the stem grows upwards and root grows downwards. This occurs because in stem the high auxin concentration in bottom creates these sides grow (longitudinally) more and the structures arcs upwards. In root the high auxin concentration in the bottom inhibits growth of this side and upper side grows more making the root to curve downwards.

   Related Questions in Biology

  • Q : Shortages occur while price controls

    Why is it true that shortages generally occur mainly while price controls are in effect?In the absence of price controls the shortage generally goes away quickly since prices are bid up to eliminate the excess demand. But along with price contro

    		•
  • Q : Management Practices-Improving Project

    Management Practices-Improving Project Brainstorm a list of problems that prevent or distract from the successful completion of projects Produce a “fishbone” diagram to classify and ca

    		•
  • Q : What is Channel Development Channel

    Channel Development: The condition whenever a company tries to raise its sales via a specific distribution channel or grouping of channels. A well-constructed and executed channel program will raise the size of your sales force and as

    		•
  • Q : Increase and decrease of plant

    When the air humidity is high does the plant transpiration increases or lowers?

    		•
  • Q : Proteins with similar number of amino

    Are proteins with similar number of each and every different amino acid which forms them essentially the same proteins?

    		•
  • Q : Difference between complete and

    What is the basic difference between a complete and an incomplete digestive system? How are such kinds of digestive tubes related or not to extracellular digestion?

    		•
  • Q : Perceptual Errors - Organizational

    One of the more interesting findings from attribution theory is that there are errors or biases that distort attributions. Each of these errors can lead to poor decisions and are discussed below. 1)     Selective perception: people selectively interpre

    		•
  • Q : Starschema and snowflake schema When

    When should a star schema be used and when a snowflake schema should be used, explain in brief?

    		•
  • Q : Describe the functions of the spleen

    Describe the functions of the spleen? Why is the total splenectomy (that is, surgical elimination of the spleen) compatible with life?

    		•
  • Q : Steps Involved- Knowledge Management -

    1. Created a setting for sharing knowledge:  access to knowledge breeds more knowledge and the best KM techniques ensure that everyone's involved. Try an open meeting policy. 2. Eliminate communication "filters: politics, turf, and implementation responsi

    		•