In old sieve tubes at the end of growing season, which of the following gets deposited over sieve plate to regulate sugar transport?
$P-$protein
Callose
Lignin
Suberin
Periblem gives rise to
Histogen theory states that epidermis is derived from the
Rod shaped elongated sclereids found in the seed coats of pulses are known as
Quiescent centre is a
Druse is a crystal or deposit of