Q2 of 44 Page 115

Leaf movement in mimosa helps to ( )

The leaf of Mimosa has 15-20 pairs of small leaflets along each midrib. As the leaf receives a stimulus such as a touch or wind , etc , it folds in & the stem droops. It is due to change in the turgor pressure at the point of touch. Turgor pressure is a hydrostatic pressure which develops due to the osmotic entry of solvent into it. Mimosa pudica shows seismonasty. Turgor pressure changes in the cells of their pulvini. Regular turgor changes in the leaflet bases cause rhythmic autonomic movement. In case of loss of turgidity, the shoots droop and the leaves show wilting. In wilting , the individual cells of leaves become flaccid due to loss of water from their interior.

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Thyroxin is responsible for ______protein synthesis_________

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Gibberellins and auxins promote growth in plants while abscisic acid arrests the same. Some situations are discussed here, State which hormones would be needed and why?


A. A gardener wants large dahlias he should use along with nutrients and other things ____auxin_______hormone.


B. In a dwarf plant the branches have to be thickened one would use ___ethylene_____ hormone.


C. Seeds are to be stored for a long time ____abscisic acid______ hormone can help.


D. Cutting the apex or tip of plants so that there are several lateral buds ___auxin_______ hormone can be used.


E. The part of the brain that helps you in solving puzzles is _____cerebrum______.

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A person has loss of control on emotions, which part of brain stops it’s function. ( )

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Diabetes is related to this gland.