231.
Thickenings in Collenchyma mainly due to deposition of
A
Cellulose
B
Pectin
C
Lignin
D
Suberin
Answer :
Pectin
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232.
Branch of Botany which deals with the internal organisation of plant is known as
A
Physiology
B
Ecology
C
Cytology
D
Anatomy
Answer :
Anatomy
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233.
Which one of the following is wrongly matched?
A
Root pressure - Guttation
B
Puccinia - Smut
C
Root - Exarch protoxylem
D
Cassia - Imbricate aestivation
Answer :
Puccinia - Smut
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234.
Aerechyma is a modification of
A
Sclerenchyma
B
Parenchyma
C
Phloem
D
None of the above
Answer :
Parenchyma
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235.
Bordered pits are very common among tracheids of
A
Monocotyledons
B
Dicotyledons
C
Pteridophytes
D
Gymnosperm
Answer :
Gymnosperm
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236.
The length of different internodes in a culm of sugarcane is variable because of
A
shoot apical meristem
B
position of axillary buds
C
size of leaf lamina at the node below each internode
D
intercalary meristem
Answer :
intercalary meristem
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237.
In leaves, the vascular bundles are
A
Bicollateral & open
B
Collateral & open
C
Collateral & closed
D
Radial & exarch
Answer :
Collateral & closed
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238.
Vascular bundles, in which phloem is found on both sides of xylem are called
A
Collateral
B
Bicollateral
C
Radial
D
Amphicribral
Answer :
Bicollateral
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239.
External Protective tissues are
A
Cortex and epidermis
B
Cork and pericycle
C
Cortex and pericycle
D
Crock and epidermis
Answer :
Crock and epidermis
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240.
Vascular tissue having abundant vessels and fibers is
A
Primary xylem
B
Secondarxylem
C
Protoxylem
D
Metaxylem
Answer :
Secondarxylem
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