Q201
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
When secondary growth in thickness is initiated in a dicot root, which of the following happens first?
A.
Cambial initials between xylem and phloem will divide
B.
Pericycle strands, outside the primary xylem will divide
C.
Periclinal division takes place, so that the cambium becomes circular
D.
Parenchymatous cells between xylem and phloem become meristematic
Q202
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
Complementary cells of lenticels are
A.
Compact and suberised
B.
Closely arranged and non-suberised
C.
Compact and lignified
D.
Loose and lignified
Q203
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
In a woody dicotyledonous tree, which of the following parts will mainly consist of primary permanent tissues?
A.
Stem and root
B.
All parts
C.
Shoot tips and root tips
D.
Flowers, fruits and leaves
Q204
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by :-
A.
Position of protoxylem
B.
Absence of secondary xylem
C.
Absence of secondary phloem
D.
Presence of cortex
Q205
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
The cork cambium, cork and secondary cortex are collectively called :-
A.
Phelloderm
B.
Phellogen
C.
Periderm
D.
Phellem
Q206
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
Some vascular bundles are described as open because these :
A.
Are not surrounded by pericycle
B.
Are surrounded by pericycle but no endodermis
C.
Are capable of producing secondary xylem and phloem.
D.
Possess conjunctive tissue between xylem and phloem.
Q207
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
Water containing cavities in vascular bundles are found in :-
A.
Cycas
B.
Pinus
C.
Sunflower
D.
Maize
Q208
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
Closed vascular bundles lack :-
A.
Cambium
B.
Pith
C.
Ground tissue
D.
Conjunctive tissues
Q209
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
Companion cells are closely associated with:
A.
Trichomes
B.
Guard cells
C.
Sieve elements
D.
Vessel elements
Q210
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
Age of a tree can be estimated by :
A.
Diameter of its heartwood
B.
Its height and girth
C.
Biomass
D.
Number of annual rings
Q211
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
Interfascicular cambium develops from the cells of:
A.
Pericycle
B.
Medullary rays
C.
Xylem parenchyma
D.
Endodermis
Q212
Allen
11. (B) ANALYTICAL QUESTIONS
MCQ
Lenticels are involved in :
A.
Photosynthesis
B.
Transpiration
C.
Gaseous exchange
D.
Food transport