In which type of plants is the leaf shown in the image found?

Which part of the leaf contains veins and veinlets?

In $Opuntia$,the spines are modifications of:

The pattern of arrangement of leaves on the stem or branch is called .......

$A$-Leaves originate from shoot apical meristem and are arranged in an acropetal order.
$R$-They are the most important vegetative organ for photosynthesis.

How is a pinnately compound leaf different from a palmately compound leaf?