B15 Genetics and evolution

Question 1

archaea

Answer 1

one of the three domains, containing primitive forms of bacteria that can live in many of the extreme environments of the world

Question 2

classification

Answer 2

the organisation of living organisms into groups according to their similarities

Question 3

domain

Answer 3

the highest level of classification. There are three domains – Archaea, Bacteria and Eukaryota

Question 4

evolutionary trees

Answer 4

models used to explain the evolutionary links between groups of organisms

Question 5

extinction

Answer 5

the permanent loss of all members of a species from an area or from the world

Question 6

speciation

Answer 6

the process by which two species evolve from a single original species by natural selection

Question 7

species

Answer 7

the smallest group of clearly identified organisms in Linnaeus’s classification system, often described as a group of organisms that can breed together and produce fertile offspring