Classification of living organisms Flashcards
Living organisms classified:
based on characteristics
Carl von linne
developed classification system of living organisms: 2million species currently named
Biology definition of species
organisms belonging to same species can reproduce & have reproductive offspring
Individuals in same species
Share similar genome ( but alleles may vary)
Taxonomy
describing, naming & grouping organisms->helps categorize species in groups through characteristics
-> provides info on appearance, behaviour, living environment
Species classification based(detailed):
-> based on structural similarities and differences:
- homolugous structure
- comparing individual development
- comparing diff behaviour
=> comparing DNA
Homolugous structure
similar physical features with different purposes -> share common ancestor
systematics
studies kinds of living organisms that live/ lived on the planet & examines the relationships between them
phylogeny
evolutionary history of species
Classification system levels
largest-smallest
1. domain
2. kingdom
3. phylum
4. class
5. order
6. family
7. genus
8. species
binomial nomenclature
scientific species name: GENUS & SPECIES parts
domains
highest level of classification
3 domains
1. BACTERIA
2. ARCHAEA
3. EUKARYOTES
kingdoms
second highest level of classification
1. bacteria
2. archaea
3. protists
4. plants
5. fungi
6. animals
