Q1. Which of the following is an example of an aquatic ecosystem?A. DesertB. ForestC. GrasslandD. Wetland
Q2. Which of the following statements about food webs is correct?A. Food webs consist of multiple interconnected food chainsB. Food webs include only herbivoresC. Food webs exclude decomposersD. Food webs do not show energy flow
Q3. Which of the following best describes fragmentation in the decomposition process?A. Breaking down of detritus into smaller particlesB. Accumulation of humus in the soilC. Conversion of inorganic nutrients into organic matterD. Removal of soluble substances from detritus
Q4. Which of the following best describes the function of ecological pyramids?A. They show nutrient cyclingB. They represent energy flow and biomass distributionC. They track the migration of speciesD. They show weather patterns
Q5. What percentage of Photosynthetically Active Radiation (PAR) is used by plants?A. 100%B. 50%C. 2-10%D. 25%
Q6. Which of the following statements about detritus food chains is correct?A. It starts with living plantsB. It begins with dead organic matterC. It does not involve decomposersD. It is independent of grazing food chains
Q7. Which of the following is an incorrect statement about ecological pyramids?A. Pyramids of energy are always uprightB. Pyramids of biomass in aquatic ecosystems are always uprightC. Pyramids of numbers can be invertedD. Ecological pyramids represent trophic structure
Q8. Which of the following is an example of a detritus food chain?A. Grass → Deer → LionB. Phytoplankton → Zooplankton → Small fishC. Dead leaves → Earthworms → BirdsD. Algae → Mollusks → Fish
Q9. Which of the following processes is responsible for the conversion of complex organic matter into simpler inorganic substances?A. HumificationB. LeachingC. DecompositionD. Fragmentation