A plant growth inhibitor hormone which causes wilting of leaves is called:
A plant growth inhibitor hormone which causes wilting of leaves is called:
Options
The correct option is C.
Marking Scheme
- 11 mark for identifying Abscisic acid as the correct option.
Hint
Think of the plant hormone that acts as a growth inhibitor and is responsible for stress responses like leaf fall and wilting.
Quick Oral Answer
Abscisic acid is the plant growth inhibitor hormone that causes the wilting of leaves.
Analysis & Explanation
Abscisic acid (ABA) is a plant hormone that acts as a growth inhibitor. Its physiological effects include promoting dormancy in seeds and buds, closing of stomata, and causing the wilting and falling of leaves.
- Option A (Auxin) is incorrect because auxins are growth-promoting hormones synthesized at shoot tips that help in cell elongation and phototropic bending.
- Option B (Cytokinin) is incorrect because cytokinins promote active cell division, particularly in fruits and seeds.
- Option D (Gibberellin) is incorrect because gibberellins are growth promoters that help in stem elongation.
Common Mistakes
- 1Students often confuse growth promoters like Auxin or Gibberellin with growth inhibitors like Abscisic acid.
Interesting Facts
Abscisic acid is also known as the 'stress hormone' of plants because it helps them tolerate adverse environmental conditions like drought by closing stomata to prevent water loss.
Spotted a mistake or something unclear?
Tell us — we fix reported answers fast.
Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2024?
This question carries 1 mark in the CBSE Class 10 Science 2024 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 "Plant Hormones" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2024 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2024 paper.