This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 15 Plant Growth And Development – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 15 Plant Growth And Development Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What do leaves collect from the air? A) Carbon dioxide. B) Nitrogen. C) Oxygen only. D) Water vapor. Show Answer Correct Answer: A) Carbon dioxide. 2. Pathogens causing fruit drop are also responsible for? A) Life span. B) Die back. C) Black dot. D) Bud rot. Show Answer Correct Answer: B) Die back. 3. During ..... , growth rate is slow but growth rate will accelerate in ..... , due to sufficient of food supply. A) Linear phase, log phase. B) Log phase, linear phase. C) Lag phase, stationary phase. D) Lag phase, log phase. Show Answer Correct Answer: D) Lag phase, log phase. 4. The rate of growth is highest in- A) Lag phase. B) Log phase. C) Steady phase. D) None. Show Answer Correct Answer: B) Log phase. 5. Which hormone stimulates stem elongation? A) Auxin. B) Gibberellin. C) Ethylene. D) Cytokinin. Show Answer Correct Answer: B) Gibberellin. 6. What is the process called when a seed develops into a small plant? A) Pollination. B) Germination. C) Fertilization. D) Photosynthesis. Show Answer Correct Answer: B) Germination. 7. This bee has a lifespan of 3-6 weeks and is always female. It makes up 90% of the hive. A) Queen Bee. B) Honey Bee. C) Worker Bee. D) Drone Bee. Show Answer Correct Answer: C) Worker Bee. 8. Growth away from gravity A) A. positive geotropism. B) B. negative geotropism. C) All the above. D) None of the above. Show Answer Correct Answer: B) B. negative geotropism. 9. Seeds or seedlings for promoting early flowering is know as ..... ? A) Dormancy. B) Cold treatment. C) Cooling. D) Vernalization. Show Answer Correct Answer: D) Vernalization. 10. Which process occurs first in a plant's life cycle? A) Flowering. B) Germination. C) Photosynthesis. D) Root spreading. Show Answer Correct Answer: B) Germination. 11. Promote cell division, involve in branching. A) Cytokinins. B) Auxin. C) Etyline. D) Abscisic. Show Answer Correct Answer: A) Cytokinins. 12. It is the mature or ripened ovule A) Seed. B) Pistil. C) Fruit. D) Stamen. Show Answer Correct Answer: A) Seed. 13. What is the function of abscisic acid? A) Stimulates root growth. B) Promotes stem elongation. C) Inhibits growth. D) Delays leaf drop. Show Answer Correct Answer: C) Inhibits growth. 14. Which of the following is a main part of a plant's stem? A) Leaves. B) Bark. C) Roots. D) Flowers. Show Answer Correct Answer: B) Bark. 15. It is the part of the flower that has most variation from plant to plant A) Stamen. B) Pistil. C) Sepal. D) Petal. Show Answer Correct Answer: D) Petal. 16. Evaluate the economic importance of secondary xylem in the timber industry: A) It is used to produce soft fruits. B) It provides strong, hard wood for furniture and houseboats. C) It is the main source of leaf primordia. D) It is used to extract chlorophyll. Show Answer Correct Answer: B) It provides strong, hard wood for furniture and houseboats. 17. The intensity of light that is good for photosynthesis is ..... A) 100-500 lux. B) 10, 000-30, 000 lux. C) 50, 000-100, 000 lux. D) 1000-5000 lux. Show Answer Correct Answer: B) 10, 000-30, 000 lux. 18. The by-product of photosynthesis is: A) Oxygen. B) Carbon-dioxiide. C) Water. D) Nitrogen. Show Answer Correct Answer: A) Oxygen. 19. Seed dormancy can be broken by: A) ABA and GA$_{3}$. B) GA$_{3}$ and ethylene. C) IAA and ABA. D) ABA and IPA. Show Answer Correct Answer: B) GA$_{3}$ and ethylene. 20. ..... used to power biological process A) APT. B) ATD. C) ADP. D) ATP. Show Answer Correct Answer: D) ATP. 21. What two things do seeds need to grow? A) Toys and books. B) Water and sunlight. C) Candy and juice. D) Clothes and shoes. Show Answer Correct Answer: B) Water and sunlight. 22. Hormone responsible for plant ans seed dormancy during draught is A) NAA. B) IBA. C) ABA. D) Zeatin. Show Answer Correct Answer: C) ABA. 23. What effect does warm temperature have on plant growth? A) It slows down chemical reactions. B) It encourages growth by speeding up photosynthesis. C) It causes leaves to curl and turn yellow. D) It helps plants store more water. Show Answer Correct Answer: B) It encourages growth by speeding up photosynthesis. 24. Apa yang dimaksud dengan pertumbuhan pada tanaman? A) Proses peningkatan ukuran, jumlah, dan volume sel secara permanen. B) Proses perubahan bentuk organ tanpa meningkatkan jumlah sel. C) Proses pembentukan organ baru tanpa meningkatkan ukuran. D) Proses pengurangan jumlah sel akibat pembelahan. Show Answer Correct Answer: A) Proses peningkatan ukuran, jumlah, dan volume sel secara permanen. 25. It is a major bottleneck causing reduction in yield and quality of harvested produce. A) Entomology. B) Pathological fruit drop. C) Pathology. D) Entomological fruit drop. Show Answer Correct Answer: B) Pathological fruit drop. 26. The shoot emerges out of the soil in search of light to start photosynthesis. A) Growth of embryo. B) Enzyme activation. C) Growth of radicle. D) Seed emergence. Show Answer Correct Answer: D) Seed emergence. 27. If you observe a plant with a green, soft stem that does not increase in diameter over time, it is likely: A) A plant with active cork cambium. B) A woody eudicot. C) A perennial tree. D) An herbaceous plant undergoing only primary growth. Show Answer Correct Answer: D) An herbaceous plant undergoing only primary growth. 28. Plant growth substances generally- A) Are produced in many parts of plant. B) Are species-specific. C) Affect mainly the cells that produce them. D) Have a single role. Show Answer Correct Answer: A) Are produced in many parts of plant. 29. What is the process in which the tips of roots and shoots exhibit continuous growth? A) Formative Phase. B) Meristematic Phase. C) Maturation Phase. D) Elongation Phase. Show Answer Correct Answer: B) Meristematic Phase. 30. Apical meristem is found in ..... A) Middle part of the stem. B) Tip of the stem and tip of the root. C) Young leaves. D) Cambium. Show Answer Correct Answer: B) Tip of the stem and tip of the root. 31. What is the process in which cells specialize into morphologically and physiologically different cells? A) Mitosis. B) Differentiation. C) Imbibition. D) Karyokinesis. Show Answer Correct Answer: B) Differentiation. 32. The plant growth process that allows cells to become specialized is ..... A) Cell maturation. B) Cell elongation. C) Cell division. D) Cell differentiation. Show Answer Correct Answer: D) Cell differentiation. 33. Apa karakteristik utama dari pertumbuhan vegetatif? A) Pertumbuhan bunga dan buah. B) Pertumbuhan klorofil. C) Pertumbuhan akar, batang, dan daun. D) Pertumbuhan biji. Show Answer Correct Answer: C) Pertumbuhan akar, batang, dan daun. 34. What is the process by which a seed takes up water rapidly and starts the growth process by activation of enzymes? A) Respiration. B) Photosynthesis. C) Imbibition. D) Germination. Show Answer Correct Answer: C) Imbibition. 35. Tall plants require water around ..... A) 50-10. B) . C) . D) None of the above. Show Answer Correct Answer: A) 50-10. 36. The fruits can be left on the tree longer so as to extend the market period. This is due to which function of GA? A) Delay senescence. B) Internodal elongation. C) Bolting. D) Parthenocarpy. Show Answer Correct Answer: A) Delay senescence. 37. What is the minimum light intensity required for photosynthesis? A) 50, 000-100, 000 lux. B) 10, 000-30, 000 lux. C) 100-500 lux. D) 1000-5000 lux. Show Answer Correct Answer: B) 10, 000-30, 000 lux. 38. In which stage of growth do plants rest or grow very little? A) Dormant. B) Intermediate. C) Reproductive. D) Juvenile. Show Answer Correct Answer: A) Dormant. 39. Bagian mana dari tanaman yang bertanggung jawab untuk pertumbuhan primer? A) Meristem apikal. B) Akar. C) Batang. D) Kambium. Show Answer Correct Answer: A) Meristem apikal. 40. Removal of shoot tips (decapitation) means loss of apical dominance and it is widely applied in- A) Tea plantation. B) Hedge-making. C) Both a and b. D) Bolting. Show Answer Correct Answer: C) Both a and b. 41. This is the emission (giving off) of electrons, thereby releasing energy to be used in photosynthesis, when those electrons are hit with a particle or packet of light. A) Pigmentation. B) Absorption spectrum. C) Photons. D) Photoelectric effect. Show Answer Correct Answer: D) Photoelectric effect. 42. A farmer while growing grape plants in his garden, observes the following:(i) Fruit size normally remained small(ii) Natural seed abortion.(iii)Reduced stem and leaf growth.Which problems could be solved by application of gibberellic acid during the development of fruits? A) (i) and (ii). B) (i) and (iii). C) (i), (ii) and (iii). D) None of these. Show Answer Correct Answer: B) (i) and (iii). 43. What is the main function of the root apical meristem? A) Photosynthesis. B) Nutrient absorption. C) Primary growth and elongation. D) Cell differentiation. Show Answer Correct Answer: C) Primary growth and elongation. 44. This is a kind of plant that flowers and sets seed two or more times in its life. A) Determinant. B) Monocarpic. C) Indeterminant. D) Polycarpic. Show Answer Correct Answer: D) Polycarpic. 45. Which of the following is helpful when recording the growth of a plant? A) Fertilizer. B) Cell Phone. C) Water. D) Bar Graph. Show Answer Correct Answer: D) Bar Graph. 46. Which of the following is an adaptation of xylem to its function? A) Living cells with large vacuoles. B) Thin cell walls made of cellulose only. C) Hollow tubes thickened with lignin for support and transport. D) Cells that actively divide via mitosis. Show Answer Correct Answer: C) Hollow tubes thickened with lignin for support and transport. 47. What is the purpose of the roots in a plant? A) To attract pollinators. B) To anchor the plant. C) To make food. D) To absorb sunlight. Show Answer Correct Answer: B) To anchor the plant. 48. Salah satu ciri makhluk hidup adalah tumbuh dan berkembang. Pengertian pertumbuhan adalah ..... A) Proses perubahan dari muda menjadi dewasa. B) Gejala hidup yang selalu memerlukan cahaya dan air. C) Proses pertumbuhan volume dan jumlah sel yang irreversible. D) Suatu proses yang tidak dapat diukur kecepatannya. E) Sarana untuk melestarikan keturunannya. Show Answer Correct Answer: C) Proses pertumbuhan volume dan jumlah sel yang irreversible. 49. Who isolated auxin from coleoptile seedling for the first time- A) Darwin. B) Miller. C) F. W. Went. D) Skoog. Show Answer Correct Answer: C) F. W. Went. 50. Which way can the seeds move from their plants? A) Car. B) Wind. C) Bus. D) Mud. Show Answer Correct Answer: B) Wind. 51. Which nutrient deficiency causes stunted growth and pale-yellow leaves? A) Nitrogen. B) Phosphorus. C) Potassium. D) Magnesium. Show Answer Correct Answer: A) Nitrogen. 52. Cells develop into different types of cells A) Growth. B) Development. C) Differentiation. D) None of these. Show Answer Correct Answer: C) Differentiation. 53. Select the characteristic used to measure growth rate. A) Body Height. B) Number of body cells. C) Body function. D) Age. Show Answer Correct Answer: A) Body Height. 54. If a shoot cutting is treated with auxin, which of the following is likely to result? A) Suppression of apical dominance. B) Bolting of the shoot. C) Growth of lateral buds. D) Extensive root production. Show Answer Correct Answer: D) Extensive root production. 55. What is the main characteristic of secondary growth in plants? A) Development of flowers. B) Increase in stem diameter. C) Formation of new leaves. D) Increase in height. Show Answer Correct Answer: B) Increase in stem diameter. 56. Can seed be moved using animals? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 57. Which of the following statements correctly explains why a plant becomes bushier when the tip of its shoot is removed? A) The removal of the plant tip also removes the auxin that is keeping lower buds from developing. B) Programmed cell death allows the plant to change its form. C) The concentration of the morphogens sent from the root to stem is increased. D) None of the above. Show Answer Correct Answer: A) The removal of the plant tip also removes the auxin that is keeping lower buds from developing. 58. Process which plant meristems become mostly inactive to withstand harsh environmental condition.ls A) Bud dormancy. B) Seed dormancy. C) Dormancy. D) Germination. Show Answer Correct Answer: A) Bud dormancy. 59. Environmental Factors are sources of variation that can be inherited from one generation to the next. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 60. What is the function of seed coat? A) It covers and protects the seed. B) It is a place where photosynthesis happen. C) It stores food. D) It can develop into young plant. Show Answer Correct Answer: A) It covers and protects the seed. 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