The plant movements which are induced by external stimuli are called……..
a) autonomic
b) paratonic
c) rapid
d) sleep
Paratonic movements in plants are classified in to…..types.
a) two
b) three
c) four
d) five
Explanation: 1. Tropic movements,
2. Nastic movements and 3. Tactic movements
The induced movements of curvature shown by the plant organ which are capable of turning in any direction are called……..
a) tropic movements
b) nastic movements
c) tactic movements
d) autonomic movements
The orientation of stem and roots in response to the force of gravity is called
a) phototropism
b) geotropism
c) hydrotropism
d) thigmotropism
Explanation: the root grows toward the force of gravity (positive) and shoot against the gravity (negative geotropism)
The tropic movement of curvature induced in plants organs in response to the unilateral effect of light is called……
a) phototropism
b) chemotropism
c) hydrotropism
d) thigmotropism
Explanation: young stems are positive phototropic
The movement of plant organs in response to the stimulus of moisture is called……
a) chemotropism
b) geotropism
c) hydrotropism
d) thigmotropism
