The Three Domains Flashcards

All 5 cards in this deck

Name the three domains.

Archaea, bacteria and eukarya.

What type of evidence led scientists to suggest the three domains instead of the five kingdoms?

Genetic analysis — comparing RNA / DNA base sequences of organisms.

True or false? Archaea and bacteria were originally placed in the same kingdom.

True. Genetic analysis showed their RNA/DNA sequences are very different, so they were split into separate domains.

What were organisms grouped by in the five kingdom system?

Features that can be seen (observable characteristics), such as body structure, rather than genetic analysis.

Which organisms belong to the Eukarya domain?

Organisms whose cells have a nucleus: animals, plants, fungi and protists.