Biology - Variation and selection

Continuous variation

characterised by a gradual change in characteristic across a population

discontinuous variation

all the individuals can be clearly divided into two or more groups

natural selection

the process in which the better equipped individuals survive and pass their genes to their offspring

antibiotic resistance

a bacterium that can’t be killed by at least one type of antibiotic

antibiotic

a chemical produced by fungi that kills bacteria

evolution

a continuing process of natural selection that leads to gradual changes on organisms over time

extinction

no living organisms of a species

selective breeding

the selection and subsequent breeding of organisms chosen by humans for their desirable properties