Q1. Which of the following represents an inverted pyramid of biomass?A. Grassland ecosystemB. Forest ecosystemC. Pond ecosystemD. Desert ecosystem
Q2. Which of the following statements about energy flow in an ecosystem is incorrect?A. Energy flows in a unidirectional mannerB. Energy is lost as heat at each trophic levelC. Energy is fully transferred from one trophic level to the nextD. Producers capture energy from sunlight
Q3. Which trophic level is occupied by primary carnivores in a grazing food chain?A. First trophic levelB. Second trophic levelC. Third trophic levelD. Fourth trophic level
Q4. Which of the following statements about ecosystem productivity is correct?A. Gross primary productivity (GPP) is always less than net primary productivity (NPP)B. NPP is the energy available to herbivoresC. GPP does not include respiration lossD. NPP is not influenced by environmental factors
Q5. Which of the following represents the correct sequence of trophic levels in an ecosystem?A. Producers → Primary consumers → Secondary consumers → DecomposersB. Producers → Secondary consumers → Primary consumers → DecomposersC. Decomposers → Producers → Primary consumers → Secondary consumersD. Primary consumers → Secondary consumers → Producers → Decomposers
Q6. Which of the following best describes the detritus food chain?A. Begins with living plantsB. Starts with dead organic matterC. Does not include decomposersD. Includes only primary consumers
Q7. Which of the following processes in decomposition results in the release of inorganic nutrients into the soil?A. HumificationB. LeachingC. FragmentationD. Mineralization
Q8. Which of the following statements about the detritus food chain is correct?A. It begins with dead organic matterB. It excludes decomposersC. It does not contribute to energy flowD. It starts with living producers
Q9. Which of the following statements about biological magnification is incorrect?A. Toxins accumulate at higher trophic levelsB. It affects top predators the mostC. Toxic substances decrease in concentration as they move up the food chainD. Human activities contribute to biological magnification
Q10. What term describes the total biomass produced by plants through photosynthesis?A. Gross Primary Productivity (GPP)B. Net Primary Productivity (NPP)C. Secondary ProductivityD. Trophic efficiency