Short answerModerate1 mark
3(v)
Ali has some pea plants in his garden which need a support to grow as seen in the picture given below.
Name the phenomenon depicted by the shoot in the given figure.
Topic: Thigmotropism
Previous-year question practice database
Answer
Exam answer
THIGMOTROPISM (also called haptotropism).
Explanation
THIGMO- means touch, -TROPISM means a directional growth movement. The tendril of the pea plant coils around a support in response to contact with it.
The prefix always names the stimulus, so reading the word tells you the answer: photo light, geo gravity, hydro water, chemo chemicals, thigmo touch.
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