AsterQuiz Ecosystems QuestOnline version Biology: Ecosystems by Johan 1 What is a community of living organisms and their physical environment called? a Population b Biome c Ecosystem 2 What do plants mainly produce through photosynthesis in an ecosystem? a Oxygen b Glucose c Proteins 3 Which trophic level consists of herbivores that eat producers? a Producers b Decomposers c Primary consumers 4 A change that increases the number of predators in an ecosystem would most likely reduce what? a Water availability b Prey populations c Nutrient levels 5 Which process contributes to nutrient cycling by breaking down dead material? a Respiration b Decomposition c Photosynthesis 6 Biodiversity is important because it helps ecosystems to: a Reduce productivity b Withstand environmental changes c Decrease energy flow 7 Which term describes organisms that make their own food? a Consumers b Producers c Decomposers 8 An example of a habitat with high biodiversity is: a Tundra b Coral reef c Desert 9 In a food chain, energy is lost mainly as: a Heat b Light c Sound 10 Which factor can threaten an ecosystem’s balance by reducing species variety? a Predation b Mutation c Pollution
