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Both antigenic shift and drift are used by viruses to adapt to selection pressures and avoid host immune systems. Antigenic shift is a slow change in the viral genes over time due to replication errors and r...

By recalling that e ln(a) = a, you can rewrite 3 2x as e 2xln(3) . Then, you can differentiate this like any other e function, by using the product rule. d/dx (e 2xln(3) ) = e 2xln(3) x d/dx (2xln(3)) d/dx (...

Essays for an English exam are best presented in the following format. 1) Introduction: outline the points you will make in answer to the question, and some background information about your text. 2) Paragra...

For instruments that use a lower register, using the bass clef would sometimes mean lots of ledger lines, which can make a piece of music hard to read. So, the alto and tenor clefs are used. The only differe...

White blood cells in the body can attack pathogens, which are micro-organisms which cause disease. The white blood cells can ingest the pathogen, produce antibodies which destroy a particular pathogen, or pr...