The Three-Domain System
As evidence of internal structures became more developed, Carl Woese proposed a three-domain system of classification.
Which domain contains plants and animals?
What is The Three-Domain System?
"The three-domain system is a biological classification that divides cellular life forms into Archaea, Bacteria, and Eukaryoty domains."
How many times does the cell divide during meiosis?
Why is understanding the human genome important for modern medicine?
Which group belongs to the domain Archaea rather than true bacteria?
If both parents are heterozygous (Bb) for a recessive trait (b), what is the probability their child will express the trait?
Modern Domains
Archaea: Primitive bacteria usually living in extreme environments.
Bacteria: True bacteria such as E. coli.
Eukaryota: Including protists, fungi, plants and animals.
Evolutionary trees are used to show how organisms are related.
Archaea look like bacteria but have very different biochemistry, which is why they have their own domain.
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