Topic 6c- Classification

Question 1

What system have animals traditionally been classified using?

Answer 1

The Linnaean System

Question 2

What are the groups in the Linnaean system (from largest to smallest)

Answer 2

Kingdom
Phylum
Class
Order
Family
Genus
Species

Question 3

Who proposed the three-domain system and when?

Answer 3

Karl Woese, 1990

Question 4

Why was the traditional Linnaean system replaced by new models of classification?

Answer 4

Knowledge of the biochemical processes taking place inside organisms developed and microscopes improved allowing scientists to analyse DNA

Question 5

What are the three groups in the three-domain system? What organisms are found in each?

Answer 5

Archaea- prokaryotic cells that can survive in harsh and extreme environments
Bacteria- true bacteria
Eukaryota- fungi, plants, animals and protists

Question 6

What is the binomial system?

Answer 6

Every organism is given a two part latin name

Question 7

What do the two parts of the binomial name refer to?

Answer 7

First is the genus and second is the species
e.g. homo (genus) sapiens (species)

Question 8

What are evolutionary trees?

Answer 8

Evolutionary trees show how scientists think different species are related to eachother