Plants which are attached to the rocks are called

The layer which separates velamen (a spongy tissue in epiphytic roots of some orchids for absorption of atmospheric moisture) from the cortex is called:

Sweet potato is a modified

Pneumatophores or breathing roots occur in

Roots that develop from parts of the plant other than the radicle are called .........

Match the following columns:

Column-$I$	Column-$II$
$P$. Stilt root	$I$. Sweet potato
$Q$. Prop root	$II$. Banyan tree
$R$. Food storage root	$III$. Rhizophora
$S$. Respiratory root	$IV$. Maize/Sugarcane