Class 11 Biology Practice Assignments: CBSE Class 11 Biology Plant Growth and Development Assignments
Explore structured practice materials through the CBSE Class 11 Biology Plant Growth and Development Assignments. Tailored for Class 11 learners, utilizing these Biology assignments ensures thorough preparation and strengthens foundational knowledge before final CBSE evaluations.
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Ques. A plant hormone used for inducing morphogenesis in plant tissue culture is
(a) cytokinins (b) ethylene
(c) abscisic acid (d) gibberellins.
Answer: A
Ques. Which combination of gases is suitable for fruit ripening?
(a) 80% CH4 and 20% CO2
(b) 80% CO2 and 20% O2
(c) 80% C2H4 and 20% CO2
(d) 80% CO2 and 20% CH2
Answer: C
Ques. Which one among the following chemicals is used for causing defoliation of forest trees?
(a) Malic hydrazide (b) 2, 4-D
(c) Amo-1618 (d) Phosphon D
Answer: B
Ques. Gibberellic acid induces flowering
(a) in short day plants under long day conditions
(b) in day-neutral plants under dark conditions
(c) in some gymnospermic plants only
(d) in long day plants under short day conditions.
Answer: D
Ques. The movement of auxin is largely
(a) centripetal (b) basipetal
(c) acropetal (d) both (a) and (c).
Answer: B
Ques. If the growing plant is decapitated, then
(a) its growth stops
(b) leaves become yellow and fall down
(c) axillary buds are inactivated
(d) axillary buds are activated.
Answer: D
Ques. Removal of apical bud results in
(a) formation of new apical bud
(b) elongation of main stem
(c) death of plant
(d) formation of lateral branching.
Answer: D
Ques. The regulator which retards ageing/senescence of plant parts is
(a) cytokinin (b) auxin
(c) gibberellin (d) abscisic acid.
Answer: A
Ques. The hormone produced during adverse environmental conditions is
(a) benzyl aminopurine
(b) bichlorophenoxy acetic acid
(c) ethylene
(d) abscisic acid.
Answer: D
Ques. Klinostat is employed in the study of
(a) osmosis
(b) growth movements
(c) photosynthesis
(d) respiration.
Answer: B
Ques. Which is produced during water stress that brings stomatal closure?
(a) Ethylene
(b) Abscisic acid
(c) Ferulic acid
(d) Coumarin
Answer: B
Ques. Bananas can be prevented from over-ripening by
(a) maintaining them at room temperature
(b) refrigeration
(c) dipping in ascorbic acid solution
(d) storing in a freezer.
Answer: C
Ques. Apical dominance is caused by
(a) abscisic acid in lateral bud
(b) cytokinin in leaf tip
(c) gibberellin in lateral buds
(d) auxin in shoot tip.
Answer: D
Ques. Cytokinins
(a) promote abscission
(b) influence water movement
(c) help retain chlorophyll
(d) inhibit protoplasmic streaming.
Answer: C
Ques. Which is employed for artificial ripening of banana fruits?
(a) Auxin (b) Coumarin
(c) Ethylene (d) Cytokinin
Answer: C
Ques. Abscisic acid causes
(a) stomatal closure (b) stem elongation
(c) leaf expansion (d) root elongation.
Answer: A
Ques. The hormone responsible for apical dominance is
(a) IAA (b) GA
(c) ABA (d) Florigen.
Answer: A
Ques. Hormone primarily connected with cell division is
(a) IAA (b) NAA
(c) cytokinin/zeatin (d) gibberellic acid.
Answer: C
Free study material for Biology
Download Practice Assignments: Class 11 Biology Chapter 13 Plant Growth And Development
Chapter Practice Questions for Class 11 Biology
Explore reliable practice questions for Chapter 13 Plant Growth And Development tailored for Class 11 learners. Use these structured worksheets to evaluate preparedness and strengthen core problem-solving skills.
Why Practice Class 11 Biology Assignments?
- Curriculum Standards: Assignments match modern CBSE sample formats to ensure relevant preparation.
- Thorough Revision: Detailed problem sets reinforce core concepts and eliminate conceptual weak spots.
- Execution Speed: Timed practice with assignment sets sharpens overall response timing.
Steps to Complete Chapter 13 Plant Growth And Development Assignments Successfully
- Concept Foundation: Review the NCERT book for Class 11 Biology thoroughly before diving into assignment tasks.
- Self-Evaluation: Solve exercises independently before inspecting professional answer guides.
- Progress Monitoring: Note down complex formulas or concepts, clearing them up using available online practice aids.
FAQs
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