15.10 New systems of classification

Question 1

Who discovered the domains?

Answer 1

Car Woose introduced a higher level of classifications above kingdoms called a domain

Question 2

What are the 3 domains?

Answer 2

Archaea - primitive forms of bacteria
Bacteria - true bacteria
Eukaryota - include nucleus

Question 3

What are evolutionary trees?

Answer 3

Models to show how organisms are related

Question 4

What are the differences between domains and kingdoms?

Answer 4

Domains are a higher level of organisation than kingdoms – organisms they contain have fewer things in common.
Domains based on biochemistry of ribosomes and method of cell
division.
Domain may contain several kingdoms

Question 5

What are the differences between domains and kingdoms?

Answer 5

Domains are a higher level of organisation than kingdoms – organisms they contain have fewer things in common.
Domains based on the biochemistry of ribosomes and method of cell division
Domains may contain several kingdoms

Question 6

Why did people accept Woese’s ideas?

Answer 6

Woese decided that there were too many differences between different types of bacteria for them all to be in the same group.
His ideas have been accepted because they have been backed up by evidence (e.g., DNA analysis), and the new model works well in practice.

Question 7

How are evolutionary trees useful?

Answer 7

Evolutionary trees model evolutionary relationships between organisms
Can be used to determine how long ago they divided away from a common ancestor.
Help to understand evolutionary pathways
Help to understand relationships between species - that look very similar but are not related, or are related but do not look
similar