✓ Board-verified
Science · 2023 · 3 marks
CBSE 2023 · Region 6 · Set 2 · Q29
Some plants like pea plants have tendrils which help them to climb up other plants. Explain how is it done. Name the plant hormone responsible for this movement.Name the phenomenon occurring in plants which are under the control of gravity, water and chemicals with one example each that shows the movement involved.
Some plants like pea plants have tendrils which help them to climb up other plants. Explain how is it done. Name the plant hormone responsible for this movement.
Name the phenomenon occurring in plants which are under the control of gravity, water and chemicals with one example each that shows the movement involved.
Marking-scheme solution
• Tendrils are sensitive to touch, when they come in contact with any support.
The part of the tendril in contact with the object does not grow as rapidly as the part of the tendril away from the object. This causes the tendril to circle around the object and cling to it.
Auxin
Geotropism : - Downward growth of roots/Growth of roots in response to gravity.
Hydrotropism : - Movement of roots towards water.
Chemotropism : - growth of pollen tubes towards ovule in response to chemical.
More from Control and Coordination
- Assertion: In our actions of writing or talking, our nervous system communicates with the muscles. Reason…2025 · asked 3×
- (i) Define a reflex arc. Why have reflex arcs evolved in animals? Trace the sequence of events which occur,…2024 · asked 3×
- How is brain protected in our body? A doctor finds in one of his patients that he is not maintaining a proper…2025 · asked 3×
- The plant hormone whose concentration stimulates the cells to grow longer on the side of the shoot which is…2025 · asked 3×
- Select from the following the correct statement about tropic movement in plants:2023 · asked 3×
- A person while climbing up a rocky hill comes into a panic state and fear. His body starts reacting in a…2025 · asked 3×
- Sense organ in which olfactory receptors are present is:2024 · asked 3×
- The growth movements of plant parts in which the direction of the stimulus determines the direction of the…2025 · asked 3×
CBSE Class 10 Science past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.