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Bach’s Brandenburg Concerto no. 2 and Kodály’s Dances of Galánta come from two periods that have very different tendencies towards harmony. The Brandenburg tends to stick to usi...

Substances move down a concentration gradient in passive transport, meaning that no energy input (ATP) is required. Hydrophilic molecules will pass down the membrane using facilitated diffusion, as they c...

Steroid hormones are lipids; they can cross directly through the cell's plasma membrane and nuclear membrane, binding to receptors. Receptor – hormone complex is formed and serves as a tr...

Using the method of binomial expansion (which I will cover in more detail) we get

(2x-3y)^4 = + 1(2x)^4(3y)^0  -  4(2x)^3(3y)^1  +  6(2x)^2(3y)^2  -  4(2x)^1(3y)^3  +  1(2x)^0(3y)^4  =

= 16x...