501.
Inner bark composed of
A
Secondary xylem
B
Secondary phloem
C
Cork
D
Phellogen
Answer :
Secondary phloem
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502.
From which plant part, cotton fibers are obtained
A
Root hairs
B
Stem hairs
C
Leaf
D
Seed coat
Answer :
Seed coat
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503.
Leaf primordium grows into adult lamina by means of
A
Marginal meristem
B
Lateral meristem
C
First apical and then marginal meristem
D
Apical meristem
Answer :
First apical and then marginal meristem
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504.
Pericycle of roots produces
A
mechanical support
B
lateral roots
C
vascular bundles
D
adventitious buds
Answer :
lateral roots
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505.
A simple mechanical tissue devoid of lignin is
A
Parenchyma
B
Collenchyma
C
Sclerenchyma
D
Chlorenchyma
Answer :
Collenchyma
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506.
Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by
A
absence of secondary phloem
B
presence of cortex
C
position of protoxylem
D
absence of secondary xylem
Answer :
position of protoxylem
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507.
Which is the correct fact about diffuse or ring porous wood?
A
Ring porous wood, carries more water for short period
B
Diffuse porous wood carries more water
C
Ring porous wood carries more water when need is higher
D
Diffuse porous wood is less specialised but conducts water rapidly throughout
Answer :
Ring porous wood carries more water when need is higher
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508.
In which of the following there is no differentiation heart wood and sap wood
A
Neem
B
Ashok
C
Mango
D
Palm
Answer :
Palm
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509.
Meristematic tissue occurs in
A
Stems
B
Roots
C
All growing tips
D
Both A and B
Answer :
All growing tips
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510.
Hydathodes occur or
A
Stem
B
Leaf
C
Roots
D
Fruits
Answer :
Leaf
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