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As with English, prepositions aren't needed in every sentence, however many nouns, verbs and adjectives do require one. Remember: they will affect the rest of a sentence grammatically. However, we can tal...

RNA is single stranded, whereas DNA is double stranded. RNA has a uracil base instead of DNA's thymine base. RNA has a ribose sugar, whereas DNA has a deoxyribose sugar.

The pumping of the heart is split into two main phases, diastole (relaxation) and systole (contraction) and involves the four main chambers of the heart, the atria and ventricles, as well as the associate...

y(x+y)=3,yx +y² =3,Differentiating with respect to x,y+x(dy/dx) +2y(dy/dx)=0when y=1, x=3-1=2 (from original equation)1+2(dy/dx) +2(dy/dx)=0,dy/dx=-1/4

The separation of powers is a system of shared power between three independent branches of government: the executive, judicial and legislative branches. Practically, the executive branch is run by the pre...