In this IBDP Biology Blog post, we will look into the binomial system and the different domains that organisms are placed into, let's get to it!
Binomial System
Binomial System: When a species is discovered given scientific name
Binomial system is universal to avoid confusion
Homo sapiens:
Genus- Homo
Species- Sapiens
Must be underlined if written by hand
- Carl Linnaeus assigned binomials to all known species in 1758
- The IBC and ICZ agreed to accept this naming convention in 1905
- Congresses meet periodically to dicuss any issues affecting classification
History of Taxa
- Different taxa are used to group and classify organisms
- Each taxon includes the taxa from the level below
- Going up taxa has large number of species sharing fewer features
Three Domains
- Eukaryota
- Bacteria
- Archea
Eukaryotic Domain Taxa
Not all domains use the same taxon
Eukaryotes use:
Domain Does
Kingdom Keith
Phylum Play
Class Classical
Order Or
Family Family
Genus Guitar
Species Songs
Dichotomous Keys
- Used to identify species
- Consists of a numbered series of pairs of descriptions
- Each pair of descriptions leads to either another pair of descriptions or an identification
- Features chosen to use in descriptions should be reliable and identifable
That's the end of this post!
Drafted by Venetia (Biology)