What is the stimulus in :
(a) phototropism
(b) geotropism
(c) chemotropism
(d) hydrotropism
(e) thigmotropism
The bending of the shoot of a plant in response to light is called :
(a) geotropism
(b) phototropism
(c) thigmotropism
(d) photonasty
Is thigmotropism in touch me not plant positive or negative?