551.
Radial vascular bundles are found in
A
Only dicot root
B
Only monocot root
C
Only Pteridophyta
D
Root of all vascular plants
Answer :
Root of all vascular plants
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552.
Two cross-section of stem and root appear similar, when viewed by naked eye. but under microscope, they can be differentiated by
A
Exarch condition of root and stem
B
Endarch condition of stem and root
C
Endarch conditions of root and exarch condition stem
D
Endarch condition of stem and exarch condition of root
Answer :
Endarch condition of stem and exarch condition of root
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553.
Monocot root has
A
Conjoint, collateral, open, polyarch vascular bundles
B
Suberized exodermis, casparian strip, passage cells, cambium
C
Suberized exodermis, polyarch xylem, exarch xylem & pith
D
Exodermis, endarch, tetrach vascular bundles
Answer :
Suberized exodermis, polyarch xylem, exarch xylem & pith
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554.
Callose blocks
A
Older tracheids
B
Heart wood
C
Sieve tubes in summer
D
Sieve tubes in winter
Answer :
Sieve tubes in winter
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555.
Function of cork cambium is to produce
A
Sec. xylem & sec. phloem
B
Cork & sec. cortex
C
Sec. phloem & sec. cortex
D
Cork
Answer :
Cork & sec. cortex
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556.
Bulliform or motor cells occur in
A
Upper epidermis of dicot leaves
B
Upper epidermis of monocot leaves
C
Lower epidermis of monocot leaves
D
Lower epidermis of dicot leaves
Answer :
Upper epidermis of monocot leaves
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557.
Cells of Collenchyma are
A
Round
B
Elongated
C
Stellate
D
Any shape
Answer :
Elongated
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558.
Which of the following plant shows multiple epidermis
A
Palm
B
Ficus
C
Croton
D
Cucurbita
Answer :
Ficus
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559.
From where the commercial jute fibres are obtained
A
Interxylary fibers
B
Xylem fibres
C
Phloem fibers
D
None of the above
Answer :
Phloem fibers
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560.
Plate meristem shows
A
Anticlinal divisions in two planes at right angle to each other
B
Anticlinal divisions in one plane
C
Both periclinal & anticlinal division in one plane
D
Three dimensional divisions
Answer :
Anticlinal divisions in two planes at right angle to each other
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