4.2.2 Classification and evolution Flashcards
1
Q
What are the taxonomic groups?
A
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
2
Q
Why do scientists classify organisms?
A
- To identify species
- To predict characteristics
- To find evolutionary links (come from a common ancestor)
3
Q
What are the three domains of life?
A
Archaea
Bacteria
Eukarya
4
Q
Define species
A
A group of organisms that are able to reproduce to produce fertile offspring
5
Q
Why is naming organisms using genus and species better than common names?
A
- Easier to classify internationally
- Provide the relationship between organisms, for example they may belong to the same genus
6
Q
What are the five kingdoms?
A
- Prokaryotae (later split into eubacteria and archaebacteria after domain was introduced)
- Protoctista
- Fungi
- Plantae
- Animalia
7
Q
How have classification systems changed?
A
- Based on observable features, now relies on evolutionary relationships by comparing similarities in DNA
- Two kingdoms (animals and plants) became five kingdoms which then became six kingdoms
- Domain was added after studies on genetic material
