This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 15 Plant Growth And Development – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 15 Plant Growth And Development Quiz 23 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The thylakoids contain ..... ? A) Chloroplast. B) Chlorophyll. C) Chlorine. D) Green pigments. Show Answer Correct Answer: B) Chlorophyll. 2. Which hormone causes internodes to lengthen? A) Gibberelins. B) Etiolation. C) Tropism. D) Cytokins. Show Answer Correct Answer: A) Gibberelins. 3. Controls guard cells A) Auxin. B) Cytokinin. C) Abscisic acid. D) Gibberellin. Show Answer Correct Answer: C) Abscisic acid. 4. In flowering plants, double fertilisation happens when ..... A) One male gamete fuses with the egg cell and another male gamete fuses with two polar nuclei. B) One male gamete fuses with two egg cells and another male gamete fuses with one polar nucleus. C) Two male gamete fuses with two egg cells. D) Two male gamete fuses with two polar nuclei. Show Answer Correct Answer: A) One male gamete fuses with the egg cell and another male gamete fuses with two polar nuclei. 5. Which hormone is in gas form? A) Gibberellin. B) Auxin. C) Ethylene. D) Cytokinin. Show Answer Correct Answer: C) Ethylene. 6. What replaces the epidermis when it cracks during secondary growth? A) Pith. B) Cork layer. C) Primary xylem. D) Sclerenchyma. Show Answer Correct Answer: B) Cork layer. 7. Weakening, opening, or otherwise altering the seed's coat in order to promote germination. A) Hardening off. B) Hybridization. C) Stratification. D) Scarification. Show Answer Correct Answer: D) Scarification. 8. Growth of plant part toward the stimulus A) A. positive tropism. B) B. negative tropism. C) All the above. D) None of the above. Show Answer Correct Answer: A) A. positive tropism. 9. Plant growth regulators can be both ..... and ..... A) Natural, synthetic. B) Hard, soft. C) Synthetic, helpful. D) Inhibiting, dormant. Show Answer Correct Answer: A) Natural, synthetic. 10. Environmental heterophylly is seen in- A) Ranunculus (Buttercup). B) Cotton. C) Coriander. D) Larkspur. Show Answer Correct Answer: A) Ranunculus (Buttercup). 11. It occurs due to chemical changes with in the seeds embryo A) Bud dormancy. B) Endogenous. C) Exogenous. D) Seed dormancy. Show Answer Correct Answer: B) Endogenous. 12. Formulate a hypothesis:Why do trees in tropical rainforests often lack distinct annual rings? A) They do not undergo secondary growth. B) The climate is consistent year-round, leading to uniform growth of secondary xylem. C) They only have primary xylem. D) The bark is too thick to see the rings. Show Answer Correct Answer: B) The climate is consistent year-round, leading to uniform growth of secondary xylem. 13. Which tissue is responsible for the growth of a plant from a seedling to an adult? A) Permanent tissue. B) Meristematic tissue. C) Epidermal tissue. D) Ground tissue. Show Answer Correct Answer: B) Meristematic tissue. 14. Secondary growth occurs mainly in: A) All monocots. B) Eudicots and some shrubs. C) Only aquatic plants. D) Herbaceous plants. Show Answer Correct Answer: B) Eudicots and some shrubs. 15. Which of the following is NOT a characteristic of a good starting medium? A) Fine and uniform. B) Well aerated. C) Packed tightly. D) Free of disease. Show Answer Correct Answer: C) Packed tightly. 16. This bee has a lifespan of 1-2 seasons and is a strong flyer. It makes up 10% of the hive. A) Worker Bee. B) Drone Bee. C) Honey Bee. D) Queen Bee. Show Answer Correct Answer: B) Drone Bee. 17. Chlorophyll is a green pigments that captures ..... for photosynthesis A) Food. B) Vitamins. C) Minerals. D) Light. Show Answer Correct Answer: D) Light. 18. Monocots have ..... cotyledon while dicots have ..... A) 1; 2. B) 2; 1. C) 1; 1. D) 2; 2. Show Answer Correct Answer: A) 1; 2. 19. What are the chemical substances which govern all the factors of development and growth within plants? A) Photosynthesis. B) Nutrients. C) Plant Growth Regulators. D) Transpiration. Show Answer Correct Answer: C) Plant Growth Regulators. 20. Which phase of plant growth involves cells dividing at the apex of roots and shoots? A) Cell enlargement. B) Cell differentiation. C) Cell division. D) Budding. Show Answer Correct Answer: C) Cell division. 21. Which of the following shows the correct relationship between a hormone and its function? A) Auxin=stimulates stem elongation. B) Ethylene=fruit maturation. C) Cytokinin=drought tolerance. D) Absisic acid=promote root growth. Show Answer Correct Answer: B) Ethylene=fruit maturation. 22. It is the male reproductive organ of flower. A) Petal. B) Sepal. C) Pistil. D) Stamen. Show Answer Correct Answer: D) Stamen. 23. The changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. A) Genotype. B) Phenotype. C) Chromosomes. D) Mutation. Show Answer Correct Answer: D) Mutation. 24. The embryonic leaves which are the first leaves to appear in a germinating seed/seedling. A) Cotyledons. B) Meristems. C) Xylem. D) Phloem. Show Answer Correct Answer: A) Cotyledons. 25. The genetic constitution of an individual organism. A) Genotype. B) Phenotype. C) Chromosomes. D) Respiration. Show Answer Correct Answer: A) Genotype. ← PreviousNext →Related QuizzesClass 11 Biology Chapter 15 Plant Growth And Development Quiz 1Class 11 Biology Chapter 15 Plant Growth And Development Quiz 2Class 11 Biology Chapter 15 Plant Growth And Development Quiz 3Class 11 Biology Chapter 15 Plant Growth And Development Quiz 4Class 11 Biology Chapter 15 Plant Growth And Development Quiz 5Class 11 Biology Chapter 15 Plant Growth And Development Quiz 6Class 11 Biology Chapter 15 Plant Growth And Development Quiz 7Class 11 Biology Chapter 15 Plant Growth And Development Quiz 8Class 11 Biology Chapter 15 Plant Growth And Development Quiz 9Class 11 Biology Chapter 15 Plant Growth And Development Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books