11.
Velamen is needed for
A
Respiration of plants
B
Protection of tissue
C
Absorption of moisture
D
None of the above
Answer :
Absorption of moisture
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12.
Collenchyma occurs in
A
herbaceous climbers
B
woody climbers
C
climbing stems
D
water plants
Answer :
climbing stems
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13.
A living mechanical tissue having pecto cellulosic wall thickening ins
A
Sclerenchyma
B
Collenchyma
C
Parenchyma
D
Aerenchyma
Answer :
Collenchyma
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14.
In dicot root, vascular cambium originates from
A
Conjunctive tissue
B
Pith rays
C
Pericycle
D
A and C both
Answer :
A and C both
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15.
External Protective tissue are
A
Xylem
B
Bast
C
Phellem
D
Duramen
Answer :
Phellem
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16.
Passage cells occur in
A
Epidermis
B
Cortex
C
Endodermis
D
Pericycle
Answer :
Endodermis
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17.
Organisation of stem apex into corpus and tunica is determined mainly by
A
planes of cell division
B
regions of meristematic activity
C
rate of cell growth
D
rate of shoot tip growth
Answer :
planes of cell division
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18.
Porous wood is characterised by
A
Absence of tracheids
B
Presence of vessels
C
Absence of vessels
D
Presence of sieve of sieve-tubes
Answer :
Presence of vessels
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19.
Ring bark occurs in
A
Psidium
B
Eucalyptus
C
Acacia
D
All of the above
Answer :
Eucalyptus
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20.
Cuticle is secreted by
A
Epidermis
B
Endodermis
C
A and B both
D
Hypodermis
Answer :
Epidermis
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