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Essential Part - Verbal and Reasoning

Directions to SolveFind the word that names a necessary part of the underlined word.
Q1:

vertebrate

A backbone

B reptile

C mammal

D animal

ANS:A - backbone

Explanation: All vertebrates have a backbone. Reptiles (choice b) are vertebrates, but so are many other animals. Mammals (choice c) are vertebrates, but so are birds and reptiles. All vertebrates (choice d) are animals, but not all animals are vertebrates.