101.
Velamen of Orchids are formed from
A
Phelloderm
B
Phellogen
C
Dermatogen
D
Cortex
Answer :
Dermatogen
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102.
Determination of age of a tree by counting annual rings is
A
Dendrochronology
B
Dendrology
C
Countrochronology
D
Chronology
Answer :
Dendrochronology
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103.
In Cucurbita stem vascular bundles are
A
Radial
B
Collateral
C
Concentric
D
Bicollateral
Answer :
Bicollateral
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104.
In summer seasons the cambium
A
Dies
B
Becomes more actives
C
Becomes less active
D
Becomes inactive
Answer :
Becomes more actives
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105.
Which of the following plant organs do not contain Collenchyma
A
Leaf bases
B
Roots
C
Roots
D
All of the above
Answer :
All of the above
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106.
In roots, lateral braches grow from
A
Epiblema
B
Pericycle
C
Cortex
D
Endodermis
Answer :
Pericycle
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107.
Cork cambium and vascular cambium are
A
parts of secondary xylem and phloem
B
parts of pericycle
C
lateral meristems
D
apical meristems
Answer :
lateral meristems
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108.
Mesophyll is differentiated into palisade and spongy parenchyma is adaptation to
A
Light intensity
B
Reduced transpiration
C
Low water availability
D
Atmospheric humidity
Answer :
Light intensity
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109.
Which of the following statement is true
A
Vessels are multicelullar and with wide lumen
B
Tracheids are multicelullar and with narrow lumen
C
Vessels are unicellular and with narrow lumen
D
Trancheids are unicellular and with wide lumen
Answer :
Vessels are multicelullar and with wide lumen
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110.
Annual ring involves
A
Early wood + Late wood
B
Heart wood
C
Sapwood
D
None of the above
Answer :
Early wood + Late wood
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