The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organisms is -

Related MCQs

• For the aquatic organisms, the source of food is –
• The first photosynthetic oxygen liberating organisms to appear on earth were
• Aquatic animal with the most developed intelligence is –
• Who proposed the adage "Survival of the fittest"?
• The concept of ‘survival of the fittest’ was first advocated by -
• 'Survival of the fittest' was coined by –
• Of all micro-organisms, the most adaptable and versatile are –
• Which of the following organisms is most likely to produce green-house gases such as nitrous oxide and methane?
• Free-living nitrogen fixing micro- organisms are -
• Saprophytes are the organisms which depend for food on –