Companion cells are found in the phloem of

Raphides are

Thick-walled and lignified with simple pits in walls and non-prosenchymatous cells without living protoplasm, usually isodiametric or irregular in shape, are:

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?

The gritty texture of the edible part of a pear is due to the presence of which of the following?

Collenchyma generally occurs