This chapter is currently out of syllabus
1
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which of the following facilitates opening of stomatal aperture?
A
Decrease in turgidity of guard cells
B
Radial orientation of cellulose microfibrils in the cell wall of guard cells
C
Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
D
Contraction of outer wall of guard cells
2
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap?
A
Acidic
B
Alkaline
C
Low refractive index
D
Absence of sugar
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Root pressure develops due to
A
passive absorption
B
active absorption
C
increase in transpiration
D
low osmotic potential in soil.
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A column of water within xylem vessels of tall trees does not break under its weight because of
A
lignification of xylem vessels
B
positive root pressure
C
dissolved sugars in water
D
tensile strength of water.
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Class 12