Plant Growth and Development — Important Questions
CBSE · Class 11 · Biology
105 important questions from Plant Growth and Development for CBSE Class 11 Biology, with answers. Part of the CBSE Class 11 Biology syllabus.
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Important Questions from Plant Growth and Development
Which plant growth regulator is known as the 'stress hormone'?
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Abscisic acid
Abscisic acid helps plants tolerate stress by inducing stomatal closure and promoting seed dormancy.
What is the first step in plant growth?
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Seed germination
Seed germination occurs when favorable environmental conditions allow the seed to begin metabolic activities and growth.
Which gas is a plant growth regulator that promotes fruit ripening?
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Ethylene
Ethylene is a gaseous hormone that plays a crucial role in fruit ripening and senescence.
What are the three phases of growth in plants?
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Meristematic, elongation, maturation
These phases represent the progression of cell development from active division to final specialization.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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