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
Pollen grains of a plant, whose $2 n=28$, are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus?
Viral infection is usually absent in
In the initial stages of protoplast culture, sorbitol/mannitol is added
Healing of wound in plants takes place by the activity of