Flashcards · Biology · Evolution and Natural Selection

Classification and the Three Domains

16 cards

What are the five kingdoms?

Animals, plants, fungi, protists and prokaryotes.
Who proposed the three domain system?

Carl Woese.
When was the three domain system proposed?

1977.
What are the three domains?

Bacteria, Archaea and Eukaryota.
What kind of evidence led to the three domains?

Genetic analysis, such as comparing ribosomal RNA genes.
Which domain includes plants and animals?

Eukaryota.
What is the difference between archaea and bacteria?

Archaea have different genes, cell membranes and ribosomes, and often live in extreme environments.
Do archaea have a nucleus?

No, they are prokaryotes.
Which kingdom do fungi belong to?

Fungi, within the domain Eukaryota.
What is a binomial name?

A two-part Latin name, with the genus first and the species second.
What is the binomial name for humans?

Homo sapiens.
Why was the five kingdoms system changed?

Genetic evidence showed that the prokaryotes were two very different groups.
Why are genes better for classification than appearance?

Appearance can be misleading, but genes show evolutionary relationships.
Name an extreme habitat in which archaea live.

Hot springs, salt lakes or deep-sea vents.
Why do scientists revise classification?

New evidence, such as DNA sequences, shows new relationships.
Common mistake about classification?

Thinking it is fixed. It changes with new evidence.