Daily duration of light is referred to as:
Critical day length
Photoperiod
Critical dark period
Light period
IAA was first isolated from:
Cornil
Gibberella
Rhizopus
Human urine
Which of the following statements about stationary phase is true?
Growth is slow due to the utilization of reserve food materials
Growth is slow due to the limitation of nutrients.
Growth is high and reaches maximum
Both a and b
The visible reaction of a plant produced as result of applied stimulus is called:
Response
Movement
Stimuli
Impulse
Which instrument is used to measure growth rate in plants?
Potometer
Auxanometer
Hygrometer
Spectrometer
The term vitamin was introduced by:
Casimir Fund
F.W. Went
Smit
Denney
In the absence of light, growth is decreased in certain plants. This phenomenon is called:
Thermotonic effect
Photoblastic effect
Etiolation
Vernalisation
Zinc is essential for the biosynthesis of:
Ethylene
Gibberellin
Cytokinin
IAA
The movement of fungal hyphae towards the nutrients is an example for:
Thigmotropic movement
Chemotropic movement
Geotropic movement
Hydrotropic movement
Which of the following shows Richmond Lang effect?
Auxin
Kinetin
Sugar