Idiom
For each of the following sentences four alternatives are given. You are required to choose the correct meaning of the idiom or phrase given or underlined in the sentence. He threw cold water over the project that the secretary had prepared.

rejected
discouraged
cleared
encouraged

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Idiom
Mutation is

a change that is inherited
a factor responsible for plant growth
a change which affects the offspring of F2 generation only
a change which affects the parents

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