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Vaccines contain an inactive form of a pathogen, or dead pathogen, and are injected into the body to give immunity to that pathogen. The inactive pathogen acts as an antigen, stimulating an immune respons...

• The independent variable is what you change throughout the experiment. Some examples of this may be temperature, pH, light levels or time. • The dependent variable is what is being measured. This is exp...

There is a certain group of adjectives in Spanish which need to be shortened- only in front of MASCULINE SINGULAR NOUNS. This is called apocapation. The adjectives are: -Uno (un hermano) -Primero (el prim...

This is a fairly common a) question on Economics HL paper one. It is a 10 mark question, so a maximum of 20 minutes should be spent on it in order to leave time for question b). It concerns the workings o...

1. After certain phrases, which can be remembered by WEIRDO: -Wishes (Quiero que/ espero que) -Emotions (Me alegro que/ Me da pena que) -Impersonal expressions (Es importante que/ Es mal que) -Reco...