(a) GA3 is applied to rice seedlings.
(b) Dividing cells stop differentiating.
(c) A rotten fruit gets mixed with urripe fruits.
(d) You forget to add cytokinin to the culture medium
(a) The elongation of stem will occur at fast rate.
(b) An undifferentiated mass of cells is formed.
(c) The unripe fruits will ripen quickly.
(d) There will be no differentiation of shoot buds.
Auxins are of two types :
(1) Natural auxins : These are naturally occuring auxins, isolated from plants and are regarded as phytohormones e.g. IAA. NAA etc.
(2) Synthetic auxins : These are synthesized by artificially e.g. IBA 2,4-D etc.
Auxin was isolated by F.W. Went from tips of coleoptiles of oat seedling.