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 There is variation in a population. Some bacteria are have resistance, others do not.Bacteria with advantegeous characteristics are more likely to survive and reproduce (when antibiotics is used in the h...

first take the 6 to the other side. 31 = x2 + 10Then take the 10 to the other side by taking it away from 3121= x2square root 21 inorder to find xx= 4.58

Breakdown answer into 5 simple marks that can be easily understood and remembered:Control variable - Keep amount of amylase and starch the sameDependent Variables - change PH levels 3 times Keep temperatu...

First of all, it is important to understand what a fiscal policy really is. This is a tool used by the government to influence the aggregate demand of the economy and consequently, the to...

Factorising x²-100: As there is no common element in x² or 100, we know this must consist of two sets of brackets not just one. we know both brackets must contain and x, and that whi...