1) Which of the following statement best define an ecosystem? a) is made up of living and non-living things b) is sum of all plants and animals c) is a collection of biotic factors and abiotic factors d) is made up of living and non-living things that interact with each other 2) Which of the following is not an example of an ecosystem a) A coral reef b) A pond c) soil d) A riverbank 3) Which of the following is not a common characteristic of biotic factors (living things)? a) photosynthesis b) growth c) respiration d) nutrition 4) Which of the following is not an example of abiotic factors? a) soil b) plants c) air d) water 5) Choose the most appropriate example of the interdependence of biotic factors and abiotic factors of an ecosystem? a) plants absorb CO2 from the atmosphere to produce food b) Grass is eaten by kangaroo c) Fox kills a rabbit d) A river overflows during rain

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