Q. Nitrogen fixation takes place in shallow and oligotrophic water, harbouring

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Q. Cyanobacteria such as Trichodesmium sp are able to fix

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Q. In euphotic zone, atmospheric CO₂ and N₂ gas are fixed into

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Q. In euphotic zone, sunlight penetrates water, proficiently used by

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Q. In eutrophication, water body acquires a high concentration of

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Q. A high concentration of ammonia can be toxic for the

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Q. Biological pump forms bridge between euphotic zone and the

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Q. In biological pump, newly formed organic material is transported to the

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Q. Nitrogen and phosphates end up in water from land, sewage water and

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Q. High concentration of nutrient in atmosphere promotes growth of

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Q. Almost, 50% of N₂ gas produced in oceans, emerged from

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Q. Heterotrophic organisms included fungi and

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Q. Cyanobacteria lives as a symbionts in corals and sponges, making up the

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Q. Anommox transforms helps in fixing nitrogen back to

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Q. Nitrogen is an essential element for marine organism than

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Q. Autotrophic organisms are characterized as, feeding

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Q. Different microbes are responsible for oxidation of ammonia, such as

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Q. Almost, 2% of marine microalgae, responsible in producing

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Q. Nitrogen and phosphate limits primary production in

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Q. Pulses consist of a broad range of

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