Q. Movement of hairs in Drosera is referred to as
Thigmotropism is the movement or growth of a plant in response to touch or physical contact. In Drosera (sundew plant), the glandular hairs (tentacles) respond to touch by bending toward the trapped insect, which helps in capturing and digesting it.
Although seismonastic movements also involve responses to stimuli, they are non-directional (e.g., Mimosa pudica closing leaves when touched). Thigmotropism, on the other hand, is directional, meaning the movement occurs toward or away from the stimulus, making it the correct answer for Drosera.
Explanation by: Official MCQ Buddy
Thigmotropism is the movement or growth of a plant in response to touch or physical contact. In Drosera (sundew plant), the glandular hairs (tentacles) respond to touch by bending toward the trapped insect, which helps in capturing and digesting it.
Although seismonastic movements also involve responses to stimuli, they are non-directional (e.g., Mimosa pudica closing leaves when touched). Thigmotropism, on the other hand, is directional, meaning the movement occurs toward or away from the stimulus, making it the correct answer for Drosera.