Everyday Science MCQs

5120 MCQs  (Page 421 of 512)

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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
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The flow of lymph is maintained by__________?
A. Movement of viscera
B. Breathing movements
C. Valves
D. All of these
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___________ component of cell wall has grreat affinity with water?
A. Lignin
B. Cellulose
C. Pectin
D. All of these
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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
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Exceptionally the positive hydrostatic pressure generated by root pressure is about___________?
A. 600 kpa
B. 800 kpa
C. 1000 kpa
D. 900 kpa
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Cuticular transpiration is _________ of total transpiration?
A. 6-8%
B. 5-7%
C. 7-9%
D. 4-6%
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In plants, water potential is determined by major factors?
A. Three
B. Four
C. Two
D. Five
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The pressure generated when water enters & inflates plant cells is called ___________ potential?
A. Water
B. Osmotic
C. Pressure
D. Solute
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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
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___________ 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
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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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