31.
If a plasmolysed cell is placed in distilled water then it returns to its original state & become turgid , this is called as
A
Plasmolysis
B
Exosmosis
C
Endosmosis
D
Deplasmolysis
Answer :
Deplasmolysis
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32.
Scotoactive stomata are occurs in
A
Sacculent xerophytes
B
Hydrophytes
C
Mesophytes
D
None of the above
Answer :
Sacculent xerophytes
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33.
Potometer works on the principle of
A
osmotic pressure
B
amount of water absorbed equals the amount transpired
C
root pressure
D
potential difference between the tip of the tube and that of the plant
Answer :
amount of water absorbed equals the amount transpired
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34.
If the given solution is of 25% concentration, then what cannot be presented for this
A
OP
B
DPD
C
Solute potential
D
TP
Answer :
TP
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35.
In a young root the most active absorption of water takes place through
A
Root cap region
B
Root hair region
C
Zone of elongation
D
Mature region with a corky layer
Answer :
Root hair region
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36.
Gibberellins were first discovered in fungal genus
A
Mucor
B
Rhizopus
C
Agaricus
D
Fusarium
Answer :
Fusarium
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37.
Transpiration from plants would be most rapid when
A
There is lot of humidity in atmosphere
B
The air is more humid
C
There is excess rain fall
D
Environmental conditions are dry
Answer :
Environmental conditions are dry
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38.
Swelling in wooden block placed in water is due to
A
Endosmosis
B
Capillarity
C
Absorption
D
Imbibition
Answer :
Imbibition
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39.
The mineral present in cell wall is
A
Na
B
Ca
C
K
D
Mg
Answer :
Ca
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40.
Which of the following statement is not correct
A
Plants absorb excess quantity of water
B
Plants take small quantity of mineral salts through soil water
C
Water and inorganic salts may also simultaneously by root hair
D
Plant absorb only one thing at a time water or inorganic salts
Answer :
Plant absorb only one thing at a time water or inorganic salts
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