211.
Active and passive absorption terms were coined by A
Kramer
B
Deutrochet
C
Priestley
D
Renner
Answer :
Renner
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212.
Water will be absorbed by root hairs when A
Concentration of salts in the soil high
B
Concentration of solutes in the cell sap is high
C
The plant is rapidly
D
They are separated from the soil by a semipermeable membrane
Answer :
Concentration of solutes in the cell sap is high
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213.
In plants the translocation of organic solutes takes place through A
Epidermis
B
Xylem
C
Phloem
D
Pith
Answer :
Phloem
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214.
During transpiration turgidity in guard cells is controlled by A
Potassium
B
Bromine
C
Sodium
D
Oxalic acid
Answer :
Potassium
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215.
The photometer is based on the principle that A
Transpiration is based on stomatal opening
B
Stomata open during day time
C
Absorption - Transpiration
D
Transpiration tension present in leaves
Answer :
Absorption - Transpiration
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216.
If a cell shrinks when placed in a solution, this solution is A
Hypotonic
B
Hypertonic
C
Isotonic
D
Pure solvent
Answer :
Hypertonic
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217.
Potato slices are immersed in a series of solution of different osmotic concentrations .No change in volume or weight is observed with slices in a 0.3M solution. The osmotic concentration of vacuolar sap, therefore A
0.3 M
B
Greater than o.3 M
C
Less than 0.3 M
D
Not related at all to the out side solution
Answer :
0.3 M
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218.
Which of the following is not a rhythnic phenomenon A
Stomatal opening & closing
B
Guttation
C
Nyctinasty
D
Photonastic movements
Answer :
Guttation
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219.
Stomata are not found in A
Algae
B
Mosses
C
Ferns
D
Liverworts
Answer :
Algae
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220.
In apple type of stomata A
Stomata are present only on the upper surface of leaf
B
Stomata are present only on the lower surface of leaf
C
Stomata are present on both surfaces of leaf
D
Stomata are vestigeal
Answer :
Stomata are present only on the lower surface of leaf
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