Pests resistant to insecticides have:

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(D) Pests develop resistance to insecticides through various physiological and biochemical mechanisms. $1$. Less permeable cuticles: This reduces the

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(D) Pests develop resistance to insecticides through various physiological and biochemical mechanisms. $1$. Less permeable cuticles: This reduces the rate of absorption of the insecticide into the pest's body. $2$. Faster storage of toxin in fat: This sequesters the toxin away from the target site,preventing immediate harm. $3$. Enzymes for metabolising toxin: Many resistant pests possess specific enzymes (like cytochrome $P450$ monooxygenases) that break down the insecticide into non-toxic metabolites. Since all these mechanisms contribute to insecticide resistance,the correct answer is $D$.

Column-$I$	Column-$II$
$(a)$ $TYPHOID$	$(1)$ $HIV$
$(b)$ $MALARIA$	$(2)$ $RHINO$ $VIRUS$
$(c)$ $COMMON$ $COLD$	$(3)$ $SALMONELLA$
$(d)$ $PNEUMONIA$	$(4)$ $PLASMODIUM$
$(e)$ $AIDS$	$(5)$ $HAEMOPHILUS$ $INFLUENZAE$

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Column-$I$ Column-$II$

$(a)$ $TYPHOID$ $(1)$ $HIV$

$(b)$ $MALARIA$ $(2)$ $RHINO$ $VIRUS$

$(c)$ $COMMON$ $COLD$ $(3)$ $SALMONELLA$

$(d)$ $PNEUMONIA$ $(4)$ $PLASMODIUM$

$(e)$ $AIDS$ $(5)$ $HAEMOPHILUS$ $INFLUENZAE$

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