Chlorenchyma cells are chlorophyll-containing:

$A$ tissue that does not form hormones is

$P$-proteins are associated with

The central lumens are obliterated in

Deciduous plants shed their leaves during hot summer or in autumn. This process of shedding of leaves is called abscission. Apart from physiological changes,what anatomical mechanism is involved in the abscission of leaves?

Aerenchyma is helpful in plants by