Select from the following the correct statement about tropic movement in plants:
Select from the following the correct statement about tropic movement in plants:
Options
Official answer
The correct option is (d). Tropic movements in plants are growth-related directional movements.
Marking scheme
- 1.1 mark for selecting the correct option (d) and stating that tropic movement is a growth-related movement.
Hint
Recall that tropic movements like phototropism and geotropism involve the bending of plant parts, which is achieved through differential growth in response to a directional stimulus.
Quick oral answer
Tropic movement is a directional growth movement of a plant part in response to an environmental stimulus, such as light or gravity.
Common mistakes
- 1.Confusing growth-independent movements (like the folding of leaves in the sensitive plant) with growth-dependent tropic movements.
- 2.Thinking that tropic movements do not depend on the direction of the stimulus.
Analysis and explanation
Tropic movements are directional movements of plant parts in response to an environmental stimulus, and they are always caused by growth.
- Option (a) is incorrect because movements due to touch (like in the sensitive plant Mimosa pudica) are independent of growth and are not classified as tropic movements.
- Option (b) is incorrect because tropic movements are directional; they occur either towards the stimulus (positive tropism) or away from it (negative tropism).
- Option (c) is incorrect because tropic movements are observed in both stems/shoots (e.g., positive phototropism) and roots (e.g., positive geotropism).
Interesting facts
The word 'tropism' comes from the Greek word 'tropos', which means 'to turn'. Thus, tropic movements are literally 'turning' movements of plants in response to stimuli.
Question details
Q11 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2023
- Section
- Section A
- Marks
- 1
- Type
- MCQ
- Chapter
- Control and Coordination
- Topic
- Coordination in Plants
- Bloom's level
- Understanding
- Syllabus topic
- Tropic movements in plants
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2023?
This question carries 1 mark in the CBSE Class 10 Science 2023 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Control and Coordination" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Coordination in Plants" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2023 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2023 paper.