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Tag Archives: nitrogen fixation

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Viruses and Bacteria & Immunity from Disease

ScienceBy William Anderson (Schoolworkhelper Editorial Team)September 15, 20101 Comment

Viruses *Viruses and bacteria are present everywhere – in the air, on the ground, in the water, on inanimate objects, and even in and around your body. -Some of these microorganisms are important in nature’s nutrient cycles and in the food and pharmaceutical industries, while others can cause diseases. What is a virus? Virus: a…

The Nitrogen Cycle

ScienceBy William Anderson (Schoolworkhelper Editorial Team)July 5, 20101 Comment

Nitrogen is required by living things to: 1. make proteins, become enzymes and make up the structures of living things 2. make nucleic acids that become DNA, the hereditary material of living things – 80% of the air around us is nitrogen gas (N2) but N2 cannot be used by most living things – N2…

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