1
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Companion cells are closely associated with
A
Sieve elements
B
Trichomes
C
Vessel elements
D
Guard cells
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
The common bottle cork is a product of
A
Phellogen
B
Xylem
C
Vascular Cambium
D
Dermatogen
3
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Some vascular bundles are described as open because these :
A
are capable of producing secondary xylem and phloem
B
are not surrounded by pericycle
C
possess conjunctive tissue between xylem and phloem
D
are surrounded by pericycle but no endodermis
4
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Function of companion cells is :
A
Providing water to phloem
B
Loading of sucrose into sieve elements
C
Loading of sucrose into sieve elements by passive transport
D
Providing energy to sieve elements for active transport
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