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                                    Assertion : In a food chain members of successive higher levels are fewer in number.Reason : Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level. | 
                            
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Answer»  Assertion : In a food chain members of successive higher levels are fewer in number. Reason : Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level.  | 
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