541.
Quiescent centre theory for demonstrating apical organization in root was proposed by
A
Schuepp
B
Hanstein
C
Clowes
D
Nageli
Answer :
Clowes
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542.
Annual rings are distinct in plants growing in
A
Tropical regions
B
Arctic regions
C
Grass lands
D
Temperate regions
Answer :
Temperate regions
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543.
Vascular bundles occur in a ring in
A
Monocot stem
B
Leaf
C
Root
D
Dicot stem
Answer :
Dicot stem
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544.
End walls of tracheids and vessels respectively are
A
Pitted & perforated
B
Perforated & pitted
C
Both perforated
D
Both pitted
Answer :
Pitted & perforated
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545.
Ectophloic siphonostele is found in
A
Osmunda and Equisetum
B
Marsilea and Botrychium
C
Adiantum and Cucurbitaceae
D
Dicksonia and Maidenhair fern
Answer :
Osmunda and Equisetum
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546.
Sap-wood is
A
Outer functional part of secondary xylem
B
Inner non functional part of secondary xylem
C
Outer as well as inner part of secondary xylem
D
None of the above
Answer :
Outer functional part of secondary xylem
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547.
The fibers of Gossypium are
A
Pappus hairs
B
Bast fibers
C
Out growth of the testa
D
Out growth of the pericarp
Answer :
Out growth of the testa
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548.
Abscission layer is made up of
A
Cork cells
B
Sclerenchymatous cells
C
Collenchymatous cells
D
Parenchyamatous cells
Answer :
Parenchyamatous cells
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549.
Lateral roots are arises from
A
Pericycle
B
Cortex
C
Pith
D
Endodermis
Answer :
Pericycle
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550.
Velaman found in epiphytic roots is meant for
A
Absorption of water from host
B
Absorption of water from air
C
Presentation
D
Protection
Answer :
Absorption of water from air
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