Q2. Which of the following is NOT a function of decomposers?A. Breaking down dead organic matterB. Releasing nutrients into the ecosystemC. Producing their own food through photosynthesisD. Converting organic substances into inorganic nutrients
Q3. Which of the following statements about nutrient cycling is incorrect?A. It helps in the continuous use of nutrientsB. It involves both biotic and abiotic componentsC. It is a unidirectional processD. It includes gaseous and sedimentary cycles
Q4. Which of the following statements about the nitrogen cycle is incorrect?A. Denitrification releases nitrogen gas back into the atmosphereB. Plants can absorb nitrogen gas directly from the atmosphereC. Nitrogen fixation converts atmospheric nitrogen into usable formsD. Decomposers help release nitrogen from organic matter
Q5. Why is the pyramid of energy always upright?A. Energy is fully transferred between trophic levelsB. Energy is lost as heat at each levelC. Consumers store more energy than producersD. Energy cycles continuously between trophic levels
Q6. In an aquatic ecosystem, the major producers are:A. ZooplanktonB. PhytoplanktonC. MollusksD. Small fish
Q7. Which of the following correctly defines net primary productivity (NPP)?A. Total energy captured by plantsB. Energy available to consumers after respirationC. Total energy lost as heat in an ecosystemD. Energy used by decomposers
Q8. Which of the following statements about food webs is incorrect?A. Food webs consist of multiple interconnected food chainsB. Food webs exclude decomposersC. Food webs show complex feeding relationshipsD. Food webs help maintain ecosystem stability
Q9. Which of the following is a correct statement about food webs?A. Food webs consist of multiple interconnected food chainsB. Food webs exclude decomposersC. Food webs do not show energy transferD. Food webs destabilize ecosystems
Q10. Which of the following statements about food webs is incorrect?A. Food webs consist of multiple interconnected food chainsB. Food webs exclude decomposersC. Food webs provide ecosystem stabilityD. Food webs illustrate the complex feeding relationships in an ecosystem