Transpiration and Plant Water Processes
Questions about plant transpiration, stomatal function, and related water exchange mechanisms in plants
Questions
Which of the following options is not a mode of excretion in plants?
- Transpiration
- Translocation
- Secretion of resins and gums
- Through leaves
In terrestrial habitats, temperature, and rain fall conditions are influenced by ____________.
- water transpiration
- transpiration
- thermoperiodism
- translocation
Apart from stomata, which is the another way through which oxygen can enter the plants?
- Through leaf tips
- Through a hole in the stem
- Through lenticel
- Thriough scars on the leaves
Main function of lenticel is _____________.
- transpiration
- guttation
- gaseous exchange
- translation
In majority of plants, stomata opens during _________.
- daytime
- night time
- twilight
- dawn
Rate of transpiration is dependent upon _________.
- tugor pressure in guard cells
- temperature
- D.P.D.
- vapour pressure deficit
Stomata is open and close due to ____________.
- circadian rhythm
- pressure of gases ouside the leaves
- pressure of gases inside the leaves
- turgor pressure of guard cells
Transpiration is high in _______.
- rainy season
- winter
- summers
- dark
Transpiration from the plants would be most rapid when _________.
- there is lot of humidity in the atmosphere
- the air is still
- there is excess of fog
- environmental conditions are dry
Transpiration is regulated by movement of ___________.
- guard cells
- subsidiary cells
- epidermal cells
- mesophyll cells
Transpiration occurs when the outer atmosphere ____________.
- is wet
- has more moisture content than the substomatal cavities
- has less moisture than substomatal cavities
- has the same moisture content as in the substomatal cavities
Transpiration rate is dependent upon _________.
- stomatal frequency
- position of stomata
- state of stomata
- all of these
When stomata open only at night, they are called ___________.
- photoactive
- scotoactive
- nyctinastic
- helioactive