ABA was first isolated by:
Denny
F.W. Went
Haagen Smith
Addicott
Bolting in rosette plants can be induced by:
Auxins
Gibberellins
Cytokinins
Ethylene
Which type of movement occurs in Oscillatoria?
Ciliary
Gliding
Cyclosis
Thermotaxis
The increase in girth or thickness of the plants is by a type of growth called:
Primary growth
Secondary growth
Lateral growth
Apical growth
Which of the following phytohormones is known as stress hormone?
Auxin
Abscisic acid
Which of the following is a growth inhibiting phytohormone?
Gibberellin
All the above
Some plants have very hard and tough seed coat which prevent the expansion of the embryo. Such seed coats are called:
Mechanically resident
Impermeable
Both a and b
Dormant
Daily duration of light is referred to as:
Critical day length
Photoperiod
Critical dark period
Light period
Which of the following shows Richmond Lang effect?
Kinetin
Sugar
Who proposed the term 'cytokinins'?
Letham
J.C.Bose
Smit
