332.
In a longitudinal section of a root, starting from the tip upward, the four zones occur in the following order:
A
Root cap, cell division, cell enlargement, cell maturation
B
Root cap, cell division, cell maturation, cell enlargement
C
Cell division, cell enlargement, cell maturation, root cap
D
Cell division, cell maturation, cell enlargement, root cap
Answer :
Root cap, cell division, cell enlargement, cell maturation
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336.
Vascular cambium forms
A
Secondary xylem & Secondary phloem
B
Primary xylem & Primary Phloem
C
Only Secondary phloem
D
Only Primary xylem
Answer :
Secondary xylem & Secondary phloem
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338.
Root apex has a zone of slow dividing cells in the middle of rapidly dividing cells, it is
A
Quiescent centre
B
Sluggish centre
C
Dormant centre
D
Nonmeristematic zone
Answer :
Quiescent centre
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340.
Lenticels are
A
Scars of old stem
B
Special stomata
C
Aerating pores in bark
D
Special stomata on hydrophytes plants
Answer :
Aerating pores in bark
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