Animals use nitrogen in the form of _____?
جانور _____ کی شکل میں نائٹروجن کا استعمال کرتے ہیں؟
- Nitrites
- Proteins
- Nitrates
- None of these
Explanation
Animals cannot use atmospheric nitrogen directly; they obtain nitrogen by consuming proteins in food.
These proteins are broken down into amino acids, which are used for growth and repair of body tissues.
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قدیم تہذیبوں اور معاشروں کا مطالعہ کیا کہلاتا ہے؟
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- None of these
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