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(D) Hydrophytes are aquatic plants that live in water. Floating leaves of hydrophytes often have a waxy cuticle on their upper surface. The primary fu

Vedclass · Accepted Answer

Clogging of stomata

Vedclass · Answer

(D) Hydrophytes are aquatic plants that live in water. Floating leaves of hydrophytes often have a waxy cuticle on their upper surface. The primary function of this waxy layer is to prevent the clogging of stomata by water and to reduce excessive water loss through transpiration,although in floating leaves,the stomata are restricted to the upper surface. However,the most direct functional consequence of the waxy coating in this context is to prevent the stomata from getting blocked by water,which would otherwise hinder gas exchange.

Column $I$ (Animals)	Column $II$ (Respiratory organs / surface)
$1$. Spider	$a$. Internal gills
$2$. Coelenterates	$b$. Book lungs
$3$. Frog	$c$. Plasma membrane
$4$. Fishes	$d$. Lungs
	$e$. External gills

The waxy surface of the floating leaves of the hydrophytes prevents

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Which of the following respiratory organs are present in spiders and scorpions?

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Which of the following does not have a specific respiratory organ,yet performs the process of respiration?

Match the Column $I$ with Column $II$.
Column $I$ (Animals) Column $II$ (Respiratory organs / surface)
$1$. Spider $a$. Internal gills
$2$. Coelenterates $b$. Book lungs
$3$. Frog $c$. Plasma membrane
$4$. Fishes $d$. Lungs
$e$. External gills
Choose the correct option.

Assertion : Blood is coloured in insects.
Reason : Insect blood has no role in $O_2$ transport.

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