This quiz works best with JavaScript enabled. Home > Class 11 > 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 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What do leaves collect from the air? A) Nitrogen. B) Oxygen only. C) Water vapor. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 2. Pathogens causing fruit drop are also responsible for? A) Bud rot. B) Life span. C) Die back. D) Black dot. Show Answer Correct Answer: C) Die back. 3. During ..... , growth rate is slow but growth rate will accelerate in ..... , due to sufficient of food supply. A) Log phase, linear phase. B) Lag phase, stationary phase. C) Lag phase, log phase. D) Linear phase, log phase. Show Answer Correct Answer: C) 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) Cytokinin. B) Gibberellin. C) Auxin. D) Ethylene. Show Answer Correct Answer: B) Gibberellin. 6. What is the process called when a seed develops into a small plant? A) Photosynthesis. B) Germination. C) Pollination. D) Fertilization. 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) Honey Bee. B) Worker Bee. C) Drone Bee. D) Queen Bee. Show Answer Correct Answer: B) Worker Bee. 8. A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of DNA. A) Genotype. B) Phenotype. C) Chromosomes. D) Mutations. Show Answer Correct Answer: C) Chromosomes. 9. 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. 10. Seeds or seedlings for promoting early flowering is know as ..... ? A) Cold treatment. B) Vernalization. C) Cooling. D) Dormancy. Show Answer Correct Answer: B) Vernalization. 11. Which process occurs first in a plant's life cycle? A) Flowering. B) Photosynthesis. C) Germination. D) Root spreading. Show Answer Correct Answer: C) Germination. 12. Promote cell division, involve in branching. A) Auxin. B) Cytokinins. C) Abscisic. D) Etyline. Show Answer Correct Answer: B) Cytokinins. 13. It is the mature or ripened ovule A) Fruit. B) Pistil. C) Seed. D) Stamen. Show Answer Correct Answer: C) Seed. 14. What is the function of abscisic acid? A) Stimulates root growth. B) Inhibits growth. C) Delays leaf drop. D) Promotes stem elongation. Show Answer Correct Answer: B) Inhibits growth. 15. 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. 16. It is the part of the flower that has most variation from plant to plant A) Petal. B) Sepal. C) Pistil. D) Stamen. Show Answer Correct Answer: A) Petal. 17. 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. 18. The intensity of light that is good for photosynthesis is ..... A) 100-500 lux. B) 1000-5000 lux. C) 10, 000-30, 000 lux. D) 50, 000-100, 000 lux. Show Answer Correct Answer: C) 10, 000-30, 000 lux. 19. The by-product of photosynthesis is: A) Carbon-dioxiide. B) Nitrogen. C) Oxygen. D) Water. Show Answer Correct Answer: C) Oxygen. 20. 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. 21. ..... used to power biological process A) ADP. B) ATP. C) APT. D) ATD. Show Answer Correct Answer: B) ATP. 22. 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. 23. Hormone responsible for plant ans seed dormancy during draught is A) IBA. B) NAA. C) ABA. D) Zeatin. Show Answer Correct Answer: C) ABA. 24. 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. 25. Apa yang dimaksud dengan pertumbuhan pada tanaman? A) Proses pembentukan organ baru tanpa meningkatkan ukuran. B) Proses peningkatan ukuran, jumlah, dan volume sel secara permanen. C) Proses perubahan bentuk organ tanpa meningkatkan jumlah sel. D) Proses pengurangan jumlah sel akibat pembelahan. Show Answer Correct Answer: B) Proses peningkatan ukuran, jumlah, dan volume sel secara permanen. Next →Related QuizzesClass 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 10Class 11 Biology Chapter 15 Plant Growth And Development Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books