1.

Differentiate between(a) Tropic Movements and Nastic Movement (b) Nervous control and Hormonal control in animals

Answer»

(a)

Tropic Movements Nastic Movements
1.Direction of response external stimuli is related to the direction of stimulusNon-directional growth movements.
2.These are curvature movements that occur due to changes in orientation in plant parts in relation to other like bending, twisting and elongationThese are turgor movements caused mainly due to loss or gain of turgidity. 
3.Stimulus is generally unilateral eg. Phototropisn, chemotropism etc.Stimulus is generally diffused eg. Seismonasty, epinasty etc.

(b)

Nervous controlHormone control
1.It is rapidIt is comparatively slow
2.It takes place through electrical signals called nerve impulsesIt take place through the transportation and action of hormones.
3.Nerve impulses travel in specific directionHormonal control is not related to any particular direction



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