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1. Name the part of plant which shows positive geotropism. Why?
 
a. Positive geotropism means  movement of plants or plants parts .
 
b.  bends in the direction of gravity.
 
2. What is the difference between movement of flower in sunflower plant and closing of the leaves in the Mimosa pudica?
 
a. Sunflower follows the path of the sun from dawn to dusk during the day time.
 
b. The solar tracking of sunflower in accordance with the path of sun is due to .
 
c. The leaves of Mimosa pudica fold and droop on touching.
 
d. The phenomenon is irrespective of the direction of stimulus.
 
e. The phenomenon is termed as , and is a / an  response to the stimulus.