1) Which of the two sets belong to the same trophic level? a) Rabbit: Tiger b) Vulture : Rat c) Grasshopper : Hawk d) Frog : Lizard 2) In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level? a) 6000 kJ b) 20 kJ c) 60 kJ d) 600 kJ 3) An ecosystem includes a) all living organisms b) non-living objects c) both living organisms and non-living objects d) sometimes living organisms and sometimes non-living objects 4) Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as a) eutrophication b) pollution c) biomagnification d) accumulation 5) In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of a) heat energy b) light energy c) chemical energy d) mechanical energy 6) Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called a) decomposers b) producers c) herbivores d) carnivores 7) In the given Figure the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available? a) T4 b) T2 c) T1 d) T3 8) What will happen if deer is missing in the food chain given below? Grass → Deer → Tiger a) The population of tiger increases b) The population of grass decreases c) Tiger will start eating grass d) The population of tiger decreases and the population of grass increases 9) When is the world environment day celebrated? a) 16 June b) 5 December c) 5 June d) 5 July 10) Which of these organisms are the most important decomposers in an ecosystem? a) Algae and fungi b) Fungi and bacteria c) Algae and bacteria d) Bacteria and virus

Our Enviroment by Sahil Shirode

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