Classifying Organisms Flashcards
Classification systems were originally based on…
Observable features
Now use…
Phylogenetic hierarchy
Hierarchy means…
That big groups are subdivided into smaller groups with no overlap
Phylogenetic means…
That organisms are placed in groups with other organisms that have close evolutionary relationships with then
Biggest group of all is the…
Kingdom
Five kingdoms…
Prokaryotae Protoctista Fungi Plantae Animalia
Biological hierarchy is…
Kingdom Phylum Class Order Family Genus Species
As hierarchy descends…
Fewer organisms in each group, with more features in common
The binomial name for humans is…
Homo sapiens
Kingdom =
Animalia
Humans are multicellular organisms
Their cells have nuclei and no cell walls
Phylum =
Chordata
Humans are animals with backbones
Class =
Mammalia
Humans have hairy skins and produce milk to feed their young
Order =
Primates
Primates have flat faces, forward-facing eyes and opposable digits
They have adaptations for living in trees
Family =
Hominidae
These are human-like creatures
Genus =
Homo
Humans are the only living member of this genus
