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Question
Maize variety resistant to stem borer shows
Options:
A .  High content of nitrogen             
B .  Low nitrogen content
C .  Low Aspartic acid
D .  High Malic acid
Answer: Option B
:
B
Biochemical and physiological characteristics such as high aspartic acid, low nitrogen and sugar content leads to pest resistance. For e.g. in maize, the low nitrogen content leads to non-preference by the maize stem borers.

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