SET 2
Introduction: This set
contains 50 multiple-choice questions focusing on ecosystem components, food
chains, food webs, trophic levels, energy flow, and the roles of producers,
consumers, and decomposers. These questions are essential for understanding the
functional aspects of ecosystems as per the Class 10 Biology syllabus.
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📘 SCIENCE
BIOLOGY | Our Environment-B
📝 Questions: 50
⏱️ Timer: 20 min
Q1. An aquarium can become self-sustaining if it has:
Q2. Consumers depend on producers:
Q3. Which is NOT a trophic level?
Q4. In the absence of producers, consumers would:
Q5. Energy flow in an ecosystem is:
Q6. Blue-green algae are considered producers because they:
Q7. Crop fields are examples of:
Q8. Food chains show:
Q9. Producers occupy which trophic level?
Q10. Producers are organisms that:
Q11. Which of the following is a natural ecosystem?
Q12. Which level has maximum energy?
Q13. Natural replenishment of soil depends mainly on:
Q14. Why do ponds and lakes not need cleaning like aquariums?
Q15. Without decomposers, the environment would:
Q16. Which of the following is a human-made ecosystem?
Q17. Large carnivores belong to:
Q18. Organisms that feed on dead plants and animals are:
Q19. Energy captured by producers is converted into:
Q20. Which ecosystem is completely artificial?
Q21. Fish in an aquarium need free space mainly for:
Q22. Each step in a food chain is called a:
Q23. Which group fixes solar energy first?
Q24. Which organisms are producers?
Q25. Which component returns nutrients to soil?
Q26. Which organism is of primary importance in an ecosystem?
Q27. An ecosystem without consumers will have:
Q28. A food web is formed by:
Q29. Animals that eat both plants and animals are:
Q30. Decomposers mainly include:
Q31. Decomposers convert complex organic substances into:
Q32. Removal of decomposers will mainly affect:
Q33. Why does an aquarium need to be cleaned regularly?
Q34. Producers use solar energy to make:
Q35. The ultimate source of energy for all ecosystems is:
Q36. Fish food in an aquarium represents:
Q37. Energy transfer from one trophic level to the next is:
Q38. Small carnivores belong to:
Q39. Dead plants in nature are decomposed mainly by:
Q40. Food chain in a pond starts with:
Q41. Which ecosystem needs continuous human care?
Q42. A garden is considered an ecosystem because:
Q43. Herbivores are also called:
Q44. Animals that eat only plants are called:
Q45. Organisms are grouped based on:
Q46. Oxygen in an aquarium is provided using:
Q47. Which statement is correct?
Q48. Which situation will disturb an aquarium ecosystem?
Q49. Autotrophs capture energy from:
Q50. A series of organisms eating one another forms a:
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