Wilting of plants takes place when one of the following takes place
If few roots are damaged
Light is cut to $50\%$
Phloem is blocked
Xylem is blocked
Estimation of the age of the is done by
Plants having little or no secondary growth are
The length of different internodes in a culm of sugarcane is variable because of
The axillary bud is constituted by the cells ‘left behind’ from
Continuous ring of cambium is formed by