Biologically most resistant plant material is [CPMT 1999; JIPMER 2001]
A) Sporopollenin
B) Lignin
C) Suberin
D) Cutin
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(A). Sporopollenin, It is the outer covering of pollen grain.. It is the most resistant material even resistant to enzymes..
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Answer:
=> BIOLOGICALLY MOST RESISTANT PLANT MATERIAL IS SPOROPOLLENIN
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