Introduction of vaccine within the body to produce immunity is an example of____________?
A. Artificially induced active immunity
B. Naturally induced active immunity
C. Artificially induced passive immunity
D. Naturally induced passive immunity
Lenticular transpiration is ___________ of total transpiration?
A. 2-3%
B. 1-3%
C. 1-4%
D. 1-2%
All plants do not possess___________?
A. Lenticels
B. Cuticle
C. Stomata
D. All of these
Cuticular transpiration is _________ of total transpiration?
A. 6-8%
B. 5-7%
C. 7-9%
D. 4-6%
Exceptionally the positive hydrostatic pressure generated by root pressure is about___________?
A. 600 Kpa
B. 800 Kpa
C. 1000 Kpa
D. 900 Kpa
Commonly in other plants than tall ones the speed of upward movement of water is____________?
A. 8mh-1
B. 1 mh-1
C. 7 mh-1
D. 4 mh-1
___________ component of cell wall has grreat affinity with water?
A. Lignin
B. Cellulose
C. Pectin
D. All of these
___________ potential is the measure of the change in water potential of a system due to the presence of solute molecules?
A. Osmotic
B. Pressure
C. Both of these
D. None of these
The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)
A. Deffusion
B. Osmosis
C. Active transport
D. None of these
The pressure generated when water enters & inflates plant cells is called ___________ potential?
A. Water
B. Osmotic
C. Pressure
D. Solute