1) Which abiotic component is essential for coral reefs to thrive? a) Sand b) Calcium carbonate c) Crabs d) Seagrass 2) Which abiotic component is essential in an aquarium ecosystem? a) Fish b) Plants c) Algae d) Artificial Light 3) Which biotic component is commonly found in seagrass beds? a) Air currents b) Sediment c) Seagrass d) Calcium carbonate 4) What is a biotic component found in rice fields? a) Soil b) Water c) Rice Plants d) Sunlight 5) Which biotic component is commonly found in tropical rainforests? a) Tall trees b) Polar bears c) Lichens d) Prairie dogs 6) What is an abiotic factor in tundra ecosystems that limits plant growth? a) Humid air b) High temperature c) Fertile soil d) Permafrost 7) Which of the following ecosystems includes both natural and artificial examples, and has biotic components like fish, plants, and microorganisms? a) Both aquatic and artificial b) Artificial c) Aquatic d) Terrestrial

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