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When we touch leaves of "Touch me not plant", they close, these movements are called    (SSC Sub. Ins. 2014)
  • a)
    photonastic movements
  • b)
    nyctinastic movements
  • c)
    seismonastic movements
  • d)
    chemonastic movements
Correct answer is option 'B'. Can you explain this answer?
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When we touch leaves of "Touch me not plant", they close, th...
Due to the action of motor cells at the base of the petiole and leaflets, the leaves of touch me not plant closes. The motor cells are activated by touch of the sensitive hairs present on the surface of touch-me-not plant. Like a number of other plant species, it undergoes changes in leaf orientation termed "sleep" or nyctinastic movement. The foliage closes during darkness and reopens in light.
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When we touch leaves of "Touch me not plant", they close, th...
Plants, we can sometimes experience a sticky or slimy feeling. This is often due to the presence of a substance called sap or resin on the leaves. Sap is a thick, sticky fluid that is produced by plants and serves various purposes such as protecting the plant from pathogens, sealing wounds, and storing nutrients. Resin is a similar substance that is produced by certain trees and plants as a defense mechanism against insects and other pests.

When we touch leaves that have sap or resin on them, the sticky feeling is caused by these substances adhering to our skin. Sap and resin are often sticky in nature to help them adhere to surfaces such as leaves and bark and provide protection to the plant.
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When we touch leaves of "Touch me not plant", they close, these movements are called (SSC Sub. Ins. 2014)a)photonastic movementsb)nyctinastic movementsc)seismonastic movementsd)chemonastic movementsCorrect answer is option 'B'. Can you explain this answer?
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