421.
When water moves through a semi permeable membrane then which of the following pressure develops?
A
O. P.
B
S. P.
C
T. P.
D
W. P.
Answer :
T. P.
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
422.
The entry of water from the soil up to xylem elements of root is due to
A
Gradient of suction pressure
B
Turgor pressure
C
Degree of imbibitions
D
Concentration of ions in water
Answer :
Gradient of suction pressure
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
423.
Which photoreceptor control the opening & closing of stomata
A
Chlorophyll-a
B
Chlorophyll-b
C
Phytochrome
D
Carotene
Answer :
Phytochrome
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
424.
Which element is not considered as macronutrient
A
Mg
B
Ca
C
Mn
D
P
Answer :
Mn
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
425.
Which of the group of elements is not essential for a normal plant
A
K,Ca.Mg
B
Fe,Zn,Mn,B
C
Pb,I, Na
D
Mg,Fe,Mo
Answer :
Pb,I, Na
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
426.
The movement of molecules from their higher concentration to lower concentration is called
A
Osmosis
B
Diffusion
C
DPD
D
DPG
Answer :
Diffusion
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
427.
Transpiration is completely absent in
A
Xerophytes
B
Mesophytes
C
Submerged hydrophytes
D
Succulents at night
Answer :
Submerged hydrophytes
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
428.
Induction of flowering in plants by low temperature treatment is called
A
Vernalization
B
Photoperiodism
C
Cryobiology
D
Chilozlogy
Answer :
Vernalization
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
429.
The movement of mineral ions into plant root cells as a result of diffusion is called
A
osmosis
B
active absorption
C
passive absorption
D
endocytosis
Answer :
passive absorption
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
430.
Root pressure is measured by
A
Manometer
B
Potometer
C
Auxanometer
D
Osmometer
Answer :
Manometer
Discuss Question
No explanation is given for this question. Let's discuss the answer together.