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प्रश्न
The outer protective layer of the pollen grain wall (sporoderm) is the exine. Which tough, resistant substance primarily makes up this layer?
विकल्प
Cellulose
Pectin
Sporopollenin
Lignin
MCQ
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उत्तर
Sporopollenin
Explanation:
The exine is composed of sporopollenin, which provides exceptional chemical and physical resistance to protect the pollen. The inner layer, the intine, is instead made of softer cellulose and pectin.
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