The movements of the plant organs in response to the stimulus of touch, contact or friction is called………
a) phototropism
b) geotropism
c) hydrotropism
d) thigmotropism
Explanation: e.g. Passiflora, Lathyrus, Smilax
The movement of plants organs in response to a chemical is called…..
a) chemotropism
b) geotropism
c) hydrotropism
d) thigmotropism
The Drosera (sundew) shows…. movement.
a) rapid
b) slow
c) tactic
d) chemotropism
The movements of plants which are
brought about by the stimuli and are non direction are called……..movements.
a) tropic movements
b) nastic movements
c) tactic movements
d) autonomic movements
Nastic movement may be of…….types.
a) two
b) three
c) four
d) five
Explanation: 1. Photonasty (light),
2. Thermonasty (temperature) and 3. Seismonasty (mechanical stimuli such as friction or touch)
The movement of touch me not or Mimosa pudica is called…….
a) photonasty
b) hyponasty
c) epinasty
d) seismonasty
