The nutrient medium for tissue culture should have
$I.$ Sucrose
$II.$ Inorganic Salts
$III.$ Amino acids
$IV.$ Vitamins
$I$ and $III$ only
$II, III$ and $IV$ only
$I, III$ and $IV$ only
$I, II, III$ and $IV$
Damaged sieve tubes are sealed by deposition of
Pomato is
Possible to achieve propagation of a large number of plants in very short duration is known as ............
By tissue culture, indefinite number of plants from a small amount of parental tissue can be obtained. This technique is of great economic importance as
Viral infection is usually absent in