151.
Which of the following is correct sequence of layers in typical monocot root (from outer surface to inside
A
Pericycle, cortex, endodermis, epiblema
B
Epiblema, endodermis, cortex, pericycle
C
Epiblema cortex, endodermis, pericycle
D
Epiblema, pericycle, cortex, endodermis
Answer :
Epiblema cortex, endodermis, pericycle
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152.
Resin ducts are found in
A
Pine
B
Bamboos
C
Teak
D
Sal
Answer :
Pine
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153.
Aerenchyma is found in
A
Hydrophytes
B
Lithophytes
C
Sciophytes
D
Xerophytes
Answer :
Hydrophytes
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154.
Gymnosperms are also called soft wood spermatophytes because they lack:
A
Cambium
B
Phloem fibres
C
Thick-walled tracheids
D
Xylem fibres
Answer :
Xylem fibres
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155.
Most distinct annual rings are formed in which region
A
Tropical
B
Temperate
C
Arctic
D
Equatorial
Answer :
Temperate
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156.
Which of the following tissue provide tensile strength against bending & swaying
A
Parenchyma
B
Collenchyma
C
Sclerenchyma
D
Sclereids
Answer :
Collenchyma
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157.
The vascular bundle in which the central phloem in surround by xylem is called
A
Bicollateral
B
Amphivasal
C
Collateral
D
Amphicribral
Answer :
Amphivasal
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158.
Tyloses are
A
Tracheal plugs which plugs the lumen of the vessels and tracheids
B
Compound sieve plates
C
Specialized secretary cells
D
Laticiferous channels
Answer :
Tracheal plugs which plugs the lumen of the vessels and tracheids
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159.
The Process by which the plant becomes woody is called
A
Calcification
B
Lignification
C
Impregnation
D
Fossilization
Answer :
Lignification
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160.
Which of the following facilitates opening of stomatal aperture?
A
Decrease in turgidity of guard cells
B
Radial orientation of cellulose micro- fibrils in the cell wall of guard cells
C
Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
D
Contraction of outer wall of guard cells
Answer :
Radial orientation of cellulose micro- fibrils in the cell wall of guard cells
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