Observe the given figures A and B. When chhui-mui (sensitive) plant is touched, its leaves fold. This is due to:
Observe the given figures A and B. When chhui-mui (sensitive) plant is touched, its leaves fold. This is due to:
Options
Official answer
Change in amount of water in cells
Marking scheme
- 1.Change in amount of water in cells
Hint
Observe the given figure and think about what could cause the leaves to fold up.
Quick oral answer
The folding of leaves in the sensitive plant is due to a change in the amount of water in the cells. When the plant is touched, it loses water and the leaves fold up. This is an example of a reflex action, which is a rapid response to a stimulus that does not require conscious thought.
Common mistakes
- 1.thinking that the folding of leaves is due to hormonal effects
- 2.thinking that the folding of leaves is due to thermal effects
- 3.thinking that the folding of leaves is due to electromagnetic effects
Analysis and explanation
The question requires the student to observe the given figure and understand the concept of reflex actions. The correct answer is C) Change in amount of water in cells, as the folding of leaves in the sensitive plant is due to a change in the amount of water in the cells. The other options are incorrect as they do not relate to the concept of reflex actions or the folding of leaves in the sensitive plant.
Interesting facts
Sensitive plants are also known as touch-me-not plants.
The folding of leaves in sensitive plants is a defense mechanism to protect themselves from herbivores.
Question details
Q8 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2025
- Section
- Section A
- Marks
- 1
- Type
- MCQ
- Chapter
- Control and Coordination
- Topic
- Reflex Actions
- Bloom's level
- Knowledge
- Syllabus topic
- Reflex Actions
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2025?
This question carries 1 mark in the CBSE Class 10 Science 2025 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 "Reflex Actions" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2025 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2025 paper.