This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 15 Plant Growth And Development – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 15 Plant Growth And Development Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the primary purpose of leaves in photosynthesis? A) To store water. B) To collect sunlight. C) To hold the plant up. D) To produce seeds. Show Answer Correct Answer: B) To collect sunlight. 2. What is vernalisation in plants? A) Enhancing photosynthesis. B) Promoting root growth. C) Hastening flowering. D) Inducing dormancy. Show Answer Correct Answer: C) Hastening flowering. 3. 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. 4. Continue to grow for many years A) Indeterminate growth. B) Irregular growth. C) Regular growth. D) Determinate growth. Show Answer Correct Answer: A) Indeterminate growth. 5. Which one prevent premature fall of fruit? A) NAA. B) Ethylene. C) GA3. D) Zeatin. Show Answer Correct Answer: A) NAA. 6. Faktor apa yang paling mempengaruhi proses fotosintesis untuk mendukung pertumbuhan tanaman? A) Suhu udara. B) Cahaya matahari. C) Tekanan udara. D) Kecepatan angin. Show Answer Correct Answer: B) Cahaya matahari. 7. 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. 8. Which plant growth regulator is responsible for controlling the physiological processes like growth, development, and movement of plants? A) Phytohormones. B) Cytokinins. C) Gibberellins. D) Auxins. Show Answer Correct Answer: A) Phytohormones. 9. Only hormone transported down A) Auxin. B) Gibberellin. C) Cytokinin. D) Abscisic acid. Show Answer Correct Answer: A) Auxin. 10. 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. 11. The most active pigments involved in photosynthesis A) Carotenoid. B) Chlorophyll. C) Phycobillins. D) Phycoerythrin. Show Answer Correct Answer: B) Chlorophyll. 12. Which hormone can stimulate stomatal closure? A) Gibberellin. B) Abscisic acid. C) Ethylene. D) Auxin. Show Answer Correct Answer: B) Abscisic acid. 13. Auxin can be bioassayed by A) Potometer. B) Lettuce hypocotyl elongation. C) Avena coleoptile curvature. D) Hydroponics. Show Answer Correct Answer: C) Avena coleoptile curvature. 14. Pada saat musim kemarau, tanaman jati menggugurkan daunnya. Hal ini disebabkan oleh akumulasi suatu hormon pada kuncup ketiak, yaitu hormon ..... A) Etilen. B) Sitokinin. C) Auksin. D) Asam absisat. E) Asam traumalin. Show Answer Correct Answer: D) Asam absisat. 15. 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. 16. An essential element needed in plant development that aids in flower and seed formation and growth. A) Nitrogen. B) Potassium. C) Phosphorus. D) Calcium. Show Answer Correct Answer: C) Phosphorus. 17. 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. 18. 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. 19. Kinetin, a modified adenine (purine) was discovered from- A) The autoclaved herring sperm DNA. B) Coconut milk. C) Corn-Kernel. D) Fungus. Show Answer Correct Answer: A) The autoclaved herring sperm DNA. 20. 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. 21. Plants placed in a dark place will quickly grow in length because ..... A) Auxin work is inhibited. B) A dark place is an ideal space. C) Dark places stimulate secondary growth. D) Metabolism will increase. E) Dark places have high humidity. Show Answer Correct Answer: A) Auxin work is inhibited. 22. 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. 23. Control the dormancy of buds and seeds. A) Abscick. B) Abscicic. C) Abscisic acid. D) Abscicik. Show Answer Correct Answer: C) Abscisic acid. 24. Nastic movement resulting from contact or mechanical disturbances such as shaking A) Heliotropism. B) Thermonasty. C) Nyctinasty. D) Seismonasty. Show Answer Correct Answer: D) Seismonasty. 25. Which specialized plant parts are hairlike extensions that protect the dermal tissue? A) Trichomes. B) Cuticles. C) Guard cells. D) Stomata. Show Answer Correct Answer: A) Trichomes. ← 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 10Class 11 Biology Chapter 15 Plant Growth And Development Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books