Discontinuous variations are:

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(A) Discontinuous variations are those that appear suddenly in a population and are not connected by intermediate forms.These variations are primarily

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Mutations

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(A) Discontinuous variations are those that appear suddenly in a population and are not connected by intermediate forms.These variations are primarily caused by $Mutations$,which are sudden,heritable changes in the $DNA$ sequence.Unlike continuous variations (which show a range of phenotypes),discontinuous variations result in distinct,clear-cut categories.Therefore,the correct option is $A$.

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