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Viruses are some of the smallest known organisms, and can cause serious disease in humans.A virus consists of a fragment of genetic material inside a protective protein coat. For a virus to survive and re...

German 'agression', is repeatedly held up as the main reason for the outbreak of World War One. This is illustrated by the Schlieffen Plan of 1905-06 which aimed at annihilating armies on two fronts. Thou...

Question: 5x² + 3x - 3y = 4, -4x - 6y + 5x² = -7.........Step 1: make the y-coefficient equal in both equarions: (y and not x because it has the lowest power so it is easier, but x w...

De-oxygenated blood in the body returns to the right atrium of the heart through the superior and inferior vena cava. This blood is pumped through to the right ventricle,...

Economics is the social science that studies the production, distribution and the consumption of goods and services. To explain this concept, we use the model of demand and supply, which is shown in a gra...