Q. Nitrobacteria converts nitrites into nitrates, such a process is known as

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Q. Ammonia can be produced from degradation of dead remainders of organisms, by

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Q. Nitrates are found in coastal up swells and

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Q. Nitrates are a source of electron acceptor in

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Q. Nitrogen is needed for synthesis of nucleotides and

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Q. In ammonification, ammonia is produced from

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Q. Book population bomb was written by

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Q. Rachel Carson was an eminent American

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Q. Book silent spring was written by

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Q. TLV stands for

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Q. Median lethal dose was set up by

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Q. For rats, oral dosage from to 500 to 5000 mg/kg, considered as

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Q. In humans, an estimated oral dosage, ranging from 5000 to 15000 mg/kg, reckoned as

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Q. In rats, estimated evaluation, regarding oral dosage up to 1mg/kg, considered as

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Q. Arsenic is capable of being occured in four different

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Q. In rats, an estimated oral dosage, about 15000 mg/kg, termed as

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Q. In humans, an oral dosage up to 5mg/kg, considerably

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Q. In rats, oral dosage ranges from 5000 to 15000 mg/kg, regarded as

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Q. Internalisation of a pollutant into an organism is called

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Q. Impact of a chemical substance on an ecosystem, measured by a

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