This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 15 Plant Growth And Development – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 15 Plant Growth And Development Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Why does a growing container need to have holes in the bottom? A) Water drainage. B) To let light in. C) To plant seeds there. D) It doesn't need holes. Show Answer Correct Answer: A) Water drainage. 2. Can seeds float on water? A) No. B) Yes. C) All the above. D) None of the above. Show Answer Correct Answer: B) Yes. 3. Which of the following is cytokinin? A) Zeatin. B) LeucineEthylene. C) Phytochrome. D) Ethylene. Show Answer Correct Answer: A) Zeatin. 4. Which of the following statements regarding photoperiodism is false? A) The response of plants to periods of light / day is termed photoperiodism. B) The shoot apices cannot perceive photoperiods. C) In day neutral plants there is no correlation between exposure to light duration and induction of flowering response. D) The site of perception of the light / dark duration is the flower. Show Answer Correct Answer: D) The site of perception of the light / dark duration is the flower. 5. Auxin was discovered by A) Francis Darwin. B) F.W. Went. C) Charles Darwin. D) F. Skoog. Show Answer Correct Answer: B) F.W. Went. 6. What is the outer layer that protects a seed called? A) An envelope. B) A seed cover. C) A coat. D) A shell. Show Answer Correct Answer: B) A seed cover. 7. To speed up the malting process in brewing industry the growth hormone used is A) Ethylene. B) Kinetin. C) Gibberellin. D) Auxin. Show Answer Correct Answer: C) Gibberellin. 8. Acetylcholine is a: A) Neurotransmitter. B) Hormone. C) Brain peptide. D) Digestive enzyme. Show Answer Correct Answer: A) Neurotransmitter. 9. Which process occurs in the 'Zone of Cell Division'? A) Osmosis. B) Meiosis. C) Mitosis. D) Differentiation. Show Answer Correct Answer: C) Mitosis. 10. What is a common disadvantage of chemical fertilizers? A) They improve the structure of the soil. B) They are inexpensive and easy to use. C) They add toxins to the soil. D) They increase the soil's ability to hold water. Show Answer Correct Answer: C) They add toxins to the soil. 11. What is the primary purpose of leaves in photosynthesis? A) To store water. B) To produce seeds. C) To collect sunlight. D) To hold the plant up. Show Answer Correct Answer: C) To collect sunlight. 12. What is vernalisation in plants? A) Promoting root growth. B) Enhancing photosynthesis. C) Hastening flowering. D) Inducing dormancy. Show Answer Correct Answer: C) Hastening flowering. 13. Two cytokinins are kinetin and Zeatin. What is the difference between the two? A) Kinetin is the active form of zeatin. B) Zeatin is the active form of kinetin. C) Zeatin is a synthetic cytokinin and kinetin is naturally occuring. D) Zeatin is a naturally occuring plant cytokinin, kinetin is not. Show Answer Correct Answer: D) Zeatin is a naturally occuring plant cytokinin, kinetin is not. 14. Continue to grow for many years A) Irregular growth. B) Regular growth. C) Indeterminate growth. D) Determinate growth. Show Answer Correct Answer: C) Indeterminate growth. 15. Which one prevent premature fall of fruit? A) GA3. B) Ethylene. C) Zeatin. D) NAA. Show Answer Correct Answer: D) NAA. 16. Faktor apa yang paling mempengaruhi proses fotosintesis untuk mendukung pertumbuhan tanaman? A) Kecepatan angin. B) Tekanan udara. C) Cahaya matahari. D) Suhu udara. Show Answer Correct Answer: C) Cahaya matahari. 17. The shaded part of plant shoot elongates at ..... the part exposed to light. A) A higher rate than. B) The same rate as. C) A lower rate than. D) None of the above. Show Answer Correct Answer: A) A higher rate than. 18. Which plant growth regulator is responsible for controlling the physiological processes like growth, development, and movement of plants? A) Cytokinins. B) Auxins. C) Phytohormones. D) Gibberellins. Show Answer Correct Answer: C) Phytohormones. 19. Only hormone transported down A) Cytokinin. B) Gibberellin. C) Abscisic acid. D) Auxin. Show Answer Correct Answer: D) Auxin. 20. Phenomenon of photoperiodism was first discovered by ..... in the "Maryland mammoth" variety of ..... A) Garner and Allard, tobacco. B) Went, tobacco. C) Garner and Allard, cocklebur. D) Knott, cocklebur. Show Answer Correct Answer: A) Garner and Allard, tobacco. 21. The most active pigments involved in photosynthesis A) Phycobillins. B) Carotenoid. C) Chlorophyll. D) Phycoerythrin. Show Answer Correct Answer: C) Chlorophyll. 22. Which hormone can stimulate stomatal closure? A) Abscisic acid. B) Auxin. C) Ethylene. D) Gibberellin. Show Answer Correct Answer: A) Abscisic acid. 23. Auxin can be bioassayed by A) Potometer. B) Hydroponics. C) Lettuce hypocotyl elongation. D) Avena coleoptile curvature. Show Answer Correct Answer: D) Avena coleoptile curvature. 24. Pada saat musim kemarau, tanaman jati menggugurkan daunnya. Hal ini disebabkan oleh akumulasi suatu hormon pada kuncup ketiak, yaitu hormon ..... A) Asam traumalin. B) Etilen. C) Auksin. D) Sitokinin. E) Asam absisat. Show Answer Correct Answer: E) Asam absisat. 25. Why does the epidermis stretch and crack during secondary growth? A) Due to insect and pathogen attacks. B) Because of the addition of secondary xylem layers increasing the circumference. C) Because the plant is growing taller. D) Because the primary phloem is pushed outward. Show Answer Correct Answer: B) Because of the addition of secondary xylem layers increasing the circumference. 26. An essential element needed in plant development that aids in flower and seed formation and growth. A) Phosphorus. B) Potassium. C) Nitrogen. D) Calcium. Show Answer Correct Answer: A) Phosphorus. 27. What is the biological significance of resin and oil produced in the barks of plants like Shorea sp.? A) They help the plant attract pollinators. B) They act as a defense mechanism against insects and pathogens. C) They are the primary source of food for the plant. D) They trigger the zone of cell division. Show Answer Correct Answer: B) They act as a defense mechanism against insects and pathogens. 28. What are the three major functions that drive plant growth and development? A) Photosynthesis, respiration, and digestion. B) Respiration, digestion, and transpiration. C) Photosynthesis, respiration, and transpiration. D) Photosynthesis, digestion, and transpiration. Show Answer Correct Answer: C) Photosynthesis, respiration, and transpiration. 29. Kinetin, a modified adenine (purine) was discovered from- A) The autoclaved herring sperm DNA. B) Fungus. C) Corn-Kernel. D) Coconut milk. Show Answer Correct Answer: A) The autoclaved herring sperm DNA. 30. You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots? A) Auxin and abscisic acid. B) Gibberellin and abscisic acid. C) IAA and gibberellin. D) Auxin and cytokinin. Show Answer Correct Answer: D) Auxin and cytokinin. 31. Plants placed in a dark place will quickly grow in length because ..... A) A dark place is an ideal space. B) Dark places stimulate secondary growth. C) Auxin work is inhibited. D) Dark places have high humidity. E) Metabolism will increase. Show Answer Correct Answer: C) Auxin work is inhibited. 32. How would the absence of lignin in secondary xylem affect a tree? A) The tree would grow faster. B) The tree would be unable to stand upright due to lack of mechanical strength. C) The tree would produce more fruit. D) The tree would be immune to pathogen attacks. Show Answer Correct Answer: B) The tree would be unable to stand upright due to lack of mechanical strength. 33. Control the dormancy of buds and seeds. A) Abscick. B) Abscicik. C) Abscisic acid. D) Abscicic. Show Answer Correct Answer: C) Abscisic acid. 34. Nastic movement resulting from contact or mechanical disturbances such as shaking A) Heliotropism. B) Seismonasty. C) Thermonasty. D) Nyctinasty. Show Answer Correct Answer: B) Seismonasty. 35. Which specialized plant parts are hairlike extensions that protect the dermal tissue? A) Cuticles. B) Guard cells. C) Stomata. D) Trichomes. Show Answer Correct Answer: D) Trichomes. 36. What role does light play in plant growth? A) It helps plants resist drought. B) It provides energy for photosynthesis. C) It transports nutrients to plant cells. D) It helps plants grow taller. Show Answer Correct Answer: B) It provides energy for photosynthesis. 37. The phenomenon of apical dominance is strengthened by- A) Removal of the tip. B) Removal of leaves. C) Production of fruits. D) Auxin production. Show Answer Correct Answer: D) Auxin production. 38. What is the process by which different plant species grow from a single seed into a plant? A) Respiration. B) Photosynthesis. C) Transpiration. D) Germination. Show Answer Correct Answer: D) Germination. 39. Promotes elongation of cells between nodes A) Cytokinin. B) Gibberellin. C) Ethylene. D) Auxin. Show Answer Correct Answer: B) Gibberellin. 40. Primary growth in plants causes ..... A) Plants to grow wider. B) Plants to grow taller. C) Plants to produce flowers. D) Leaves to fall off. Show Answer Correct Answer: B) Plants to grow taller. 41. Which are growth hormones that are produced by the apical meristem? A) Cytokins. B) Auxins. C) Etiolations. D) Gibberelins. Show Answer Correct Answer: B) Auxins. 42. Water loss from the leaf structure through evaporatoin is the plant process called: A) Absorption. B) Respiration. C) Transpiration. D) Photosynthesis. Show Answer Correct Answer: C) Transpiration. 43. What happens to seeds in soil over time compared to those without soil? A) They turn yellow. B) They grow slower. C) They grow faster. D) They stop growing. Show Answer Correct Answer: C) They grow faster. 44. For pollination, the pollen must go from the stamen to the ..... A) Pistil. B) Bee. C) Leaf. D) Stamen. Show Answer Correct Answer: A) Pistil. 45. In our topic auxin who is the son of Charles Darwin? A) Charles Darwin Jr. B) France Darwin. C) Francis Charles Darwin. D) Francis Darwin. Show Answer Correct Answer: D) Francis Darwin. 46. When a seed soaks up water, what happens to the seed? A) Shrinks. B) Explodes. C) Expands. D) Nothing. Show Answer Correct Answer: C) Expands. 47. What is the term used for the increase in the diameter of the plant body by the division of the secondary meristem? A) Primary Growth. B) Secondary Growth. C) Unlimited Growth. D) Limited Growth. Show Answer Correct Answer: B) Secondary Growth. 48. There are two types of vascular tissue in plants. Which one brings water up from the roots? A) Phloem. B) Xylem. C) All the above. D) None of the above. Show Answer Correct Answer: B) Xylem. 49. Which hormone help the plant to increase their water absorption surface? A) ABA. B) Ethylene. C) Gibberellic acid. D) Auxins. Show Answer Correct Answer: B) Ethylene. 50. Rearrange the FOUR phases of a typical sigmoid curve into the CORRECT sequenceI Log phaseII Stationary phaseIII Linear phaseIV Lag phase A) I, IV, III, II. B) I, IV, II, III. C) IV, I, II, III. D) IV, I, III, II. Show Answer Correct Answer: D) IV, I, III, II. 51. The first step in seed germination is ..... A) Breaking of testa. B) Activation of hormone. C) Imbibition. D) Nutrient mobilisation. Show Answer Correct Answer: C) Imbibition. 52. The cork cambium produces A) Cork in the vascular cambium. B) Cork in the xylem. C) Vascular cambium. D) Cork in the bark layer. Show Answer Correct Answer: D) Cork in the bark layer. 53. Which of the following promotes senescence mainly? A) Auxin. B) ABA. C) Cytokinin. D) Gibberellin. Show Answer Correct Answer: C) Cytokinin. 54. After double fertilisation, the ovary will develop into ..... A) Testa. B) Endosperm. C) Embryo. D) Fruit. Show Answer Correct Answer: D) Fruit. 55. The chemical reactions where carbon is removed from carbon dioxide to make other organic molecules such as sugars. A) Photoelectric effect. B) Light-dependent reactions. C) Carbon fixing reactions. D) Photons. Show Answer Correct Answer: C) Carbon fixing reactions. 56. Why do plants eventually need soil? A) For water only. B) For support only. C) For sunlight absorption. D) For nutrients. Show Answer Correct Answer: D) For nutrients. 57. Which tissue is pushed outward and eventually compressed into a thin layer during secondary growth? A) Pith. B) Secondary xylem. C) Vascular cambium. D) Primary phloem. Show Answer Correct Answer: D) Primary phloem. 58. What is the process called where plants manufacture their own food? A) Transpiration. B) Photosynthesis. C) Oxidation. D) Respiration. Show Answer Correct Answer: B) Photosynthesis. 59. Natural cytokinins are synthesised in regions where rapid cell division occurs. Such regions are A) Root apices. B) Developing shoot buds. C) Young fruits. D) All of these. Show Answer Correct Answer: D) All of these. 60. AUXIN Derived from the Greek word ..... which means to grow A) Auxien. B) Auxein. C) Auxiin. D) Auxieen. Show Answer Correct Answer: B) Auxein. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books