The leaf base is a modified form of .........

Which type of phyllotaxy is found in Alstonia?

The coloured part in Poinsettia $(Euphorbia)$ is

Reticulate venation is found in dicot leaves,while in monocot leaves,venation is of the parallel type. Biology being a 'Science of exceptions',find out any exception to this generalization.

When the incision in a leaf is more than halfway towards the midrib,it is called:

$A$ unipinnate compound leaf can be differentiated from a branch having simple leaves by