Download 6.4 the classification system continues

NOTES 6.4 The classification system continues to change
Learning Intentions:
Success Criteria:
To understand how the Linnaean Taxonomy System
works
I can use the Linnaean Taxonomy system
I can remember the 7 levels of classification
To remember the 7 levels of classification
Linnaean Taxonomy Dichotomous key
The Linnaean Taxonomy Dichotomous key was first developed by Carl Linnaeaus 1707-1778
In the Linnaean Key all living things are grouped into a large grouped called a KINGDOM first.
Then they are divided into smaller groups called PHYLA.
Each Phylum has seven CLASSES
There are 7 different levels to get to the final name of each organism
1.
2.
3.
4.
5.
6.
7.
Kingdom
Phylum
Class
Order
Family
Genus
Species
For example the domestic
Kingdom
Animalia
Phylum
Chordata
Class
Mammalia
Order
Carnivora
Family
Felidae
Genus
Felis
Species
catus
cat
Scientific Name: ‘Felis catus’
Organisms are named form the last 2 groupings on the Linnaean Dichotomous key
Organisms have double names:
The domestic dog :
Canis
Familiaris
Genus Species
Linnaeus double naming system
Binomial naming system
1st name: Genus – starts with a capital letter
2nd name Species- No capital letter
The double naming system is always written using italics (sloping letters)
A species is a group of organisms that look the similar to each other and can produce fertile offspring
Eg domestic cats belong to the same species because they can breed together and have kittens which are fertile(
in other words they can also breed.
A horse and a donkey can breed to get a mule however their offspring are infertile and therefore cannot breed.
Changing to science and naming
The development of the microscope let to the discovery of a single celled organism called Bacteria
This led to the number of kingdoms increasing form 3 to 5
Plants
Plantae
Animals
Animalia
Minerals
Fungi
Protists
monera
There is also a 6th kingdom ARCHEA
Single celled organisims that could live in extreme conditions eg very salty water or hot waters
The genetic materials DNA of these organisms was different from that of other bacteria
Ways to remember the 7 classification system
King Phillip Can Order Fine Good Soup
King Philip Crawled Over Four Gooey Snails
K
Kingdom
Anamalia
P
Phylum
Chordata/vertebrata
C
Class
Mammalia
O
Order
Primates
Humans scientific name
‘Homo sapiens’
F
Family
Hominidae
G
Genus
Homo
S
Species
sapiens