The apparatus used for measuring rate of transpiration is called as,
Psychrometer
Potometer
Spectrometer
galvanometer
Loss of water from aerial parts of plants in the form of water vapour is called as,
Transpiration
guttation
evaporation
all of the above
Which of the following substances are not antitranspirants?
Colour plastics and silicone oils
Low viscosits waxes and ABA
Phenylmercuric acetate and very high conc of Co2
None of the above
Guttation occurs through,
hydathodes
stomata
both(a) and (b)
lenticels
Closure of stomata of normal plants can be induced by,
IAA
ABA
GA3
All of above
The stomata open when guard cells become,
turgid
flaccid
Plasmolysed
transpired
The stomata close in water-stressed plants due to accumulation of ABA in,
Mesophyll cells
subsidiary cells
guard cells