Question: 1 :- Which one of the following is an artificial ecosystem?
Answer:-(b) Crop field
Question: 2 :- In a food chain, the third trophic level is always occupied by
Answer:- (a) Carnivores
Question: 3 :- An ecosystem includes
Answer: (c) Both living organisms and non-living objects
Question: 4 :- In the given food chain, suppose the amount of energy at fourth trophic level is 5 kJ, what will be the energy available at the producer level?
Grass â†’ Grasshopper â†’ Frog â†’ Snake â†’ Hawk
Answer: (d) 5000 kJ
Question: 5 - Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
Answer: (c) Biomagnification
Question: 6 - Depletion of ozone is mainly due to
Answer: (a) Chlorofluorocarbon compounds
Question: 7 - Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called
Answer: (b) Producers
Question: 8 - In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of
Answer: (c) Chemical energy
Question: 9 - Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the
Answer: (b) Ecological pyramid
Question: 10 - Flow of energy in an ecosystem is always
Answer: (a) Unidirectional
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