Taxonomy (DOLT) Flashcards
Three domains
- Eukaryota (membrane bound organelles)
- Bacteria (prokaryotic cells)
- Archaebacteria (prokaryotic cells)
Carl Linnaeus
Swedish
1700s
Taxonomy system and binomial nomenclature
12,000 species categorized
Taxonomy
Kingdom Phylum Class Order Family Genus Species
Species definition
A group of organisms that can produce viable and fertile offspring
Requirements for mating different species
Not done naturally
Must be from same genus
Do not produce viable and fertile offspring
ex. mule
Dichotomous keys
Series of questions based on physical characteristics that categorize organisms into smaller and smaller groups
Questions can only have two answers
Phylogenic trees
Evolutionary story
Show ancestral relations
Prove all living things are related
Phylogenic relationships
how closely one organism is to another on a tree
Cladograms
Type of phylogenic tree
Show latest common denominators
Qualitative
Show divergences
Phylogenic divergence
When one species becomes two because of selective pressures
ex. Darwin’s finches
Eukaryota
4 kingdoms:
- Animalia (multicellular, heterotrophic)
- Plantae (multicellular, autotrophic)
- Fungi (multicellular and unicellular, absorptive heterotrophs)
- Protista (mostly unicellular, auto and heterotrophic)
Absorptive heterotrophs
Digest food externally
Prokaryota
2 domains:
- Archaea
- Bacteria
Archaebacteria
Unicellular, heterotrophic
“extremophiles”
Eubacteria
Unicellular, auto and heterotrophic