Q. 95.0( 2 Votes )
i. What does the given experimental set-up demonstrate?
ii. 
(a) Label the two parts indicated by Question marks and labelled 1 and 2 in the above diagram.
(b) Suggest a suitable caption or heading for the above diagram.
OR
What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?
Answer :
i. The first diagram shows the response of plant parts towards the light. This is known as phototropism.
• The light acts as a stimulus.
• The shoot shows a positive response to the stimulus, i.e., it bends towards the sunlight.
• The root shows negative response to the stimulus, i.e., it bends away from the sunlight.
ii. a) The two parts in the diagram will be labelled as:
1. Spinal cord (Central Nervous System)
2. Effector (muscle in the arm)
b) The suitable caption or the heading for the diagram is Reflex Arc.
***note: the reflex arc is the pathway by which reflex action is completed***
OR
Difference between the manner in which movement takes place in a sensitive plant and the movement in our legs is given in the table below:
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