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Changes in price mean a shift along the curve, changes other than the price of a good (e.g. change in price of a substitute good) shift the demand curve. 

DNA is unziped by DNA helicase. RNA polymerase catalyses the formation of a complementary strand of pre-mRNA, using the non-coding strand of DNA as a template. The pre-mRNA contains non-coding regions (in...

Coral reefs: diverse/fragile ecosystem, found in coastal areas/tropics/warm waters 23-29degrees C, (temp needed to sustain growth) valuable goods and services, threatened by global warming, rising SST. 1)...

From the definition of a derivative: f'(x) = lim h->0 ((f(x+h) - f(x)) / h) Let f(x) = x^n --> d\dx x^n = lim h->0 (((x+h)^n - x^n) / h) By binomial expansion, (x+h)^n = x^n + nhx^(n-1) + n(n-1)h...

"Cuando" sin tilde se utiliza siempre que se quiere expresar una condición en el futuro. Ejemplo: Iré a la casa de mi amigo cuando tenga tiempo. En este caso, ir a la casa de s...