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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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. To leave someone in the lurch

None of these
Constant source of annoyance to someone
To desert someone in his difficulties
To put someone at ease
To come to compromise with someone

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