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Question

(C) Statement $A$ is correct: Ethylene promotes root growth and root hair formation,thus helping the plants to increase their absorption surface.State

Vedclass · Accepted Answer

only $C$ is incorrect

Vedclass · Answer

(C) Statement $A$ is correct: Ethylene promotes root growth and root hair formation,thus helping the plants to increase their absorption surface.Statement $B$ is correct: Natural cytokinins are synthesized in regions where rapid cell division occurs,such as root apices,developing shoot buds,and young fruits.Statement $C$ is incorrect: $2,4-D$ ($2,4$-dichlorophenoxyacetic acid) is a synthetic auxin used as a herbicide to kill dicotyledonous weeds. It does not affect mature monocotyledonous plants. The statement incorrectly claims it kills monocots and spares dicots.Since $A$ and $B$ are correct and $C$ is incorrect,the option stating 'only $C$ is incorrect' is the right answer.

Column $I$	Column $II$
$a.$ Auxin	$(i)$ Root hair formation
$b.$ Cytokinin	$(ii)$ Seed development
$c.$ Ethylene	$(iii)$ Xylem differentiation
$d.$ $ABA$	$(iv)$ Nutrient mobilisation

List-$I$ (Growth Regulator)	List-$II$ (Function/Effect)
$A$. $2,4-D$	$I$. Brewing industry
$B$. $GA_3$	$II$. Stimulation of stomatal closure
$C$. Kinetin	$III$. Herbicide
$D$. $ABA$	$IV$. Nutrient mobilisation

Column-$I$	Column-$II$
$A$. Cytokinin	$i$. Stimulates closure of stomata
$B$. Ethylene	$ii$. Increases stem length
$C$. Gibberellin	$iii$. Promotes lateral shoot growth
$D$. Abscisic acid	$iv$. Found in large amounts in tissues undergoing senescence

Similar Questions

$I.$ Kinetin is a degradative substance from $DNA$.
$II.$ $ABA$ is present in all plants including lower plants.
$III.$ Low ratio of cytokinin to auxin favours root formation only.
$IV.$ $ABA$ is synthesized catabolically through glycolysis pathway.
Choose the correct combination of options.

Match the following:

Column $I$ Column $II$

$a.$ Auxin $(i)$ Root hair formation

$b.$ Cytokinin $(ii)$ Seed development

$c.$ Ethylene $(iii)$ Xylem differentiation

$d.$ $ABA$ $(iv)$ Nutrient mobilisation

Match List-$I$ with List-$II$:
List-$I$ (Growth Regulator) List-$II$ (Function/Effect)
$A$. $2,4-D$ $I$. Brewing industry
$B$. $GA_3$ $II$. Stimulation of stomatal closure
$C$. Kinetin $III$. Herbicide
$D$. $ABA$ $IV$. Nutrient mobilisation

Choose the correct answer from the options given below:

Thigmotropism is best observed in

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