Concepts of classification

• Organisms can be classified into groups by the features that they share
• Species is a group of organisms that can reproduce to produce fertile offspring
• The binomial system of naming species as an internationally agreed system in which the scientific name of an organism is made up of two parts showing the genus and species
• Groups of organisms which share a more recent ancestor (are more closely related) have base sequences in DNA that are more similar than those that share only a distant ancestor