validation - question three

Question 1

section one

Answer 1

American microbiologist and physicist, Carl Woese introduced the three-domain system involving eukarya, bacteria and archaea.

Question 2

section two

Answer 2

this system was introduced because all cells are similar in a variety of ways. it is thought that all cells came from a common ancestor and evolved into three different cell types. each representing a domain.

Question 3

section three

Answer 3

eukarya is under eukaryotes, all containing a nucleus and membrane-bound organelles. bacteria and archaea are under prokaryotes as they have no nucleus or membrane-bound organelles.

Question 4

section four

Answer 4

bacteria is a simple single-celled organism and archaea are single-celled organisms that typically love in extreme conditions.