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(D) $Escherichia \ coli$ $(E. \ coli)$ is widely used in genetic experiments for several reasons:$1$. It is a haploid organism,which makes it easier t

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Both $(b)$ and $(c)$

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(D) $Escherichia \ coli$ $(E. \ coli)$ is widely used in genetic experiments for several reasons:$1$. It is a haploid organism,which makes it easier to observe the effects of mutations as there is no dominant allele to mask recessive traits.$2$. It has a very short generation time and can be easily cultured in a laboratory setting using simple nutrient media.$3$. Its genome is relatively small and well-mapped,facilitating genetic manipulation and analysis.Therefore,both $(b)$ and $(c)$ are correct reasons.

Column $I$	Column $II$
$A$. Griffith	$i$. Lac operon
$B$. Jacob and Monod	$ii$. $DNA$ is the genetic material
$C$. Meselson and Stahl	$iii$. Transforming principle
$D$. Hershey and Chase	$iv$. $DNA$ replicates semiconservatively

$Escherichia \ coli$ is an important material for genetic experiments because

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