In grasses certain adaxial epidermal cells along the vein modify themselves into large, empty, colourless cells called ________.

(1) Bark

(2) Bulliform cells

(3) Bundle sheath cells

(4) Spongy mesophyll cells

Bulliform cells help in

The similar size of vascular bundle in monocot leaf is due to

The tissue involved in secondary growth are

In dicot stem the cells of cambium present between primary xylem and primary phloem is the ___________.

When cambial ring becomes active, the cells cut off toward pith mature into

When cambial rings become active and the cells cut off towards periphery mature into

The cambium is generally more active on the _________ side than the _________ side.

The primary and secondary phloem gets gradually crushed due to the continued formation and accumulation of _________.

In dicot stem, at some places the cambium forms a narrow band of parenchyma which passes through the secondary xylem and secondary phloem in radial direction these are called _________.