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Question : Abingdon tortoise in Galapagos islands became extinct with in -(1)- after -(2), were introduced on the island, apparently due to the greater browsing efficiency of the -(3)-

Answer»

(1) a year, (2) DARWIN finches, (3) tortoise 
(1) a decade, (2) goats, (3) tortoise 
(1) a year, (2) GOAT, (3) goat
(1) a decade, (2) goats, (3) goats 

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