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Subjects
Science State Board
Class 9
Organisation of tissues
Plant tissues
16.
Permanent tissues - Xylem & Phoem
Exercise condition:
2
m.
State whether true or false:
1.
Xylem and phloem are simple permanent tissue.
True
False
2.
The lignification secondary cell wall is absent in sieve elements and present in phloem fibres.
False
True
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