Adaptation = charateristics that help an organism to survive + reproduce
Predator + prey species are interdepdent - a change in the population of one animal directly affects the population of the other
Differences in characteristics within a species are known as variation.
Inherited Variation comes from characteristics inherited from your parents
Variation caused by your surroundings is called environment variation - many characteristics are affected by both
Characteristics that can only have certain values show discontinuos variation. Characteristics that can be any value within a range show continuous variation. You inherit characteristics from your parents in your DNA
Chromosomes = long strands arranged in DNA - sections of DNA that contain the information to produce a characteristic are called genes
Watson, Crick, Franklin + Wilkins worked together to produce a model of the structure of DNA
Gene banks store genetic samples from organisms - may help to prevent extinction
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