Cytokinin
Auxin
Gibberellin
Abscissic acid
2, 3 and 4
2 and 4
1 and 3
All of these
Transport minerals and water from the roots to the leaves
Act as a membrane impermeable to water and gas
Transport food from the leaves to the other parts of the plant
Protect the plant from herbivorous animals
J C Bose
Birbal Sahni
P Maheshwari
N S Parihar
Cashew nut
Coffee
Groundnut
Pine
Apple
Date
Grape
Plum
Ephedra
Cycas
Ginkgo
Adtantum
Dissolution of middle lamella
Degradation of primary wall
Delignification
Removal of suberin deposits in the cell wall
Chloroplast
Mitochondria
Endoplasmic reticulum
Golgi bodies
Only 1
Only 2
Both 1 and 2
Neither 1 nor 2
Only 1
1 and 2
·2 and 3
All of these