191.
Suberin is
A
Polysaccharide
B
Protein
C
Fatty substance
D
Pectocellulose
Answer :
Fatty substance
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192.
Main function of lenticel is
A
transpiration
B
guttation
C
gaseous exchange
D
bleeding
Answer :
transpiration
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193.
Pith is not well developed in
A
Monocot stem
B
Monocot root
C
Dicot Stem
D
Dicot root
Answer :
Dicot root
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194.
Velamen, the spongy tissue found in
A
Breathing roots of halophytes
B
Parasitic plants
C
All aerial roots
D
Aerial roots of epiphytic orchids
Answer :
Aerial roots of epiphytic orchids
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195.
Endodermis is a part of
A
Vascular tissue system
B
Extrastelar tissue system
C
Epidermal tissue system
D
Intrastelar tissue system
Answer :
Extrastelar tissue system
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196.
Some vascular bundles are described as open because these
A
are surrounded by pericycle but not endodermis
B
are capable of producing secondary xylem and phloem
C
possess conjunctive tissue between xylem and phloem
D
are not surrounded by pericycle
Answer :
are capable of producing secondary xylem and phloem
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197.
Passage cells are thin walled cells found in
A
phloem elements that serve as entry points for substance for transport ot other plant parts
B
testa of seeds to enable emergence of growing embryonic axis during seed germination
C
central region of style through which the pollen tube grows towards the ovary
D
endodermis of roots facilitating rapid transport of water from cortex to pericycle
Answer :
endodermis of roots facilitating rapid transport of water from cortex to pericycle
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198.
In which living cell of vascular tissue the healthy nucleus and cytoplasm are present
A
Sieve tub e
B
Trancheids
C
Vessels
D
Rays
Answer :
Rays
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199.
Transition of radial vascular bundle in root to conjoint vascular bundle in stem occurs in which zone?
A
Epicotyl
B
Hypocotyl
C
Meristem
D
At base of stem
Answer :
Hypocotyl
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200.
A concentric Amphivasal vascular bundle is that in which
A
Centrally located xylem is surrounded by phloem
B
Centrally located phloem is surrounded by xylem
C
Phloem is flanked by xylem on interior sides only
D
Xylem is flanked by phloem on exterior sides only
Answer :
Centrally located phloem is surrounded by xylem
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