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An articular infinitive, that is, an infinitive with an article, is a verbal noun. An article gives the doing word the same qualities of a noun, so an action can, for ins...

En mi familia, hay tres personas; mi madre, mi hermana, y yo. 

Mi madre tiene pelo rubio y largo. Se llama Susan. Es más baja que mi hermana y yo. Tiene ojos verdes como mi hermana y yo. Ella traba...

At a constructive margin two plates separate or diverge. There are two types of constructive margins. Firstly, where plates move apart in oceanic areas they produce mid-oceanic ridges. Secondly, where the...

Competitive inhibitors, compete for the active site. They have a similar shape to the substrate and so can bind to the active site and prevent the substrate from binding. This means the subtrate cannot bi...

Greenhouse gases include methane and carbon dioxide. These gases enhance the greenhouse effect which consequently warm up our planet. 

The sun's energy arrives as short wave radiation, this type of...