This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Improvement In Food Resources > Class 9 Science Chapter 15 Improvement In Food Resources – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 15 Improvement In Food Resources Quiz 4 (13 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A molecule of DNA is made up of ..... A) Amino acids and proteins. B) ATP and enzymes. C) Paired nucleotides. D) Receptor enzymes. Show Answer Correct Answer: C) Paired nucleotides. 2. A farmer wants to develop a wheat variety that grows well in both drought-prone and saline soils. Which strategy should they adopt? A) Use only local seeds. B) Apply excess fertilizers. C) Switch to organic farming only. D) Select a hybrid variety with abiotic stress tolerance. Show Answer Correct Answer: D) Select a hybrid variety with abiotic stress tolerance. 3. Improved quality crop means A) Resistance to abiotic factor. B) Good in yield. C) Good in disease resistance. D) Good amount of nutrients. Show Answer Correct Answer: D) Good amount of nutrients. 4. Which of the following is called coloured plastid? A) Chloroplast. B) Adhesive. C) Chromoplast. D) None of the above. Show Answer Correct Answer: C) Chromoplast. 5. Which defines a codon in DNA or mRNA? A) Pair of nucleic acid and sugar. B) Pair of phosphate and sugar. C) Three-base code. D) Two-base code. Show Answer Correct Answer: C) Three-base code. 6. What is the primary reason for using hybrid crops in the UAE? A) To increase soil erosion. B) To improve crop resistance to pests and harsh environmental conditions. C) To decrease water usage. D) To decrease crop production. Show Answer Correct Answer: B) To improve crop resistance to pests and harsh environmental conditions. 7. Significance of crop rotation is ..... A) If one crop catches disease another crop survives. B) Presence of different crops takes different nutrients from the soil, this maintains balance of nutrients in the soil. C) Both 1 and 2. D) Neither 1 nor 2. Show Answer Correct Answer: C) Both 1 and 2. 8. Which of the following are kharif crops A) Rice. B) Soybean. C) Maize. D) All. Show Answer Correct Answer: D) All. 9. Why are manures used in bulk to increase soil fertility A) Since the manures contain nutrients in larger quantity. B) Since the manures contain nutrients in very small quantity. C) Since the manures contain nutrients in small quantity. D) Since manures do not contain nutrients. Show Answer Correct Answer: C) Since the manures contain nutrients in small quantity. 10. In which situation would a tube well be most effective? A) Shallow rocky soil. B) Deep water table. C) Hill slopes. D) Arid desert area with no aquifer. Show Answer Correct Answer: B) Deep water table. 11. DNA has a ..... strand; RNA has a ..... strand. A) Double/double. B) Double/triple. C) Single/single. D) Double/single. Show Answer Correct Answer: D) Double/single. 12. Plants manufacture there food with the help of ..... A) Oxygen, sunlight. B) Water, sunlight, CO$_{2}$. C) CO2, Oxygen, sunlight. D) Oxygen, sunlight, water. Show Answer Correct Answer: B) Water, sunlight, CO$_{2}$. 13. Intercropping is designed to: A) Increase pesticide use. B) Grow the same crop repeatedly. C) Maximize nutrient utilization and reduce pest spread. D) Increase cost of production. Show Answer Correct Answer: C) Maximize nutrient utilization and reduce pest spread. ← PreviousRelated QuizzesScience QuizzesClass 9 QuizzesClass 9 Science Chapter 15 Improvement In Food Resources Quiz 1Class 9 Science Chapter 15 Improvement In Food Resources Quiz 2Class 9 Science Chapter 15 Improvement In Food Resources Quiz 3 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books