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?

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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