Dissolved Oxygen (DO), an important parameter of water quality, is essential for the survival of:घुलित ऑक्सीजन (DO), जल गुणवत्ता का एक महत्वपूर्ण मानदंड, किसके अस्तित्व के लिए आवश्यक है?
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Correct answer: C. Fishमछली
Explanation
Aquatic organisms like fish breathe the oxygen dissolved in water through their gills. DO below about 4–5 mg/L stresses fish, and very low DO causes fish kills.मछली जैसे जलीय जीव गलफड़ों द्वारा जल में घुली ऑक्सीजन से श्वसन करते हैं। लगभग 4–5 mg/L से कम DO पर मछलियाँ तनाव में आ जाती हैं और बहुत कम DO पर मर जाती हैं।More People, Development and Environment questions
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