Mutations are \( \mathrm{X} \) while Darwinian variation are \( \ma...

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Mutations are \( \mathrm{X} \) while Darwinian variation are \( \mathrm{Y} \). \( \mathrm{X} \) and \( Y \) are
(1) \( \mathrm{X} \rightarrow \) Small and directional
\( \mathrm{Y} \rightarrow \) Random and directionless
(2) \( \mathrm{X} \rightarrow \) Small and directional
\( \mathrm{Y} \rightarrow \) Random and directional
(3) \( \mathrm{X} \rightarrow \) Random and directionless
\( Y \rightarrow \) Small and directional
(4) \( \mathrm{X} \rightarrow \) Random and directional
\( Y \rightarrow \) Small and directional
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