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A relative pronoun, such as “qui” or “que”, is a word that is used to connect two parts of a sentence together when referring to someone or something that has already been mentioned earl...

A Hydrocarbon is an organic molecule containing only hydrogen and carbon atoms. Alkanes are saturated hydrocarbons, meaning they are only made up of single bonds. The carbons are 'saturated' with hydrogen...

In the primary immune response, there is antigen presentation followed by clonal selection, expansion and differentiation of helper t cells. This leads to plasma cells releasing antibodies and the develop...

Well, let's start with an example. ej. Estaba atravesando la calle y de repente un coche se estralló contra un árbol. (ex. I was crossing the road and all of a sudden a car crashe...