Chap 18 Classification Flashcards
Who was binomial nomenclature developed by?
Carolus Linnaeus
What is taxonomy?
Taxonomy is when a scientist classifies organisms and assigns each organism A universally accepted name
What is binomial nomenclature?
In binomial nomenclature each species is assigned a two-part scientific name . the scientific name is always written in italics. the first word is capitalized and the second word is lowercase. The first word is the genus and the second word is the species
What was Linnaeus’s system of classification?
It was a hierarchal system of classification that included seven levels …small to largest ..species genus family order class phylum kingdom
What is a taxon and what are some examples
Level of Linnaeus’s system… Family , kingdom, phylum
What is the plural of taxon
Taxa
What is phylogeny?
The study of evolutionary relationships among organisms , and when organisms are grouped into categories that represent lines of evolutionary descent not just physical similarities
What is evolutionary classification
The strategy of grouping organisms together based on the evolutionary history
The higher the level of the taxon,…
The farther back in time is a common ancestor of all the organisms in the taxon
Convergent evolution
When natural selection operating on species in similar ecological environment causes similarities in appearance
What is cladistic analysis
A method that identifies and considers only those characteristics of organisms are evolutionary innovations or new characteristics that arise as lineages evolve over time
What are derived characters
Characteristics that appear in recent parts of the lineage but not its older members
What is a cladogram
Diagram that shows the evolutionary relationships among a group of organisms
What is a molecular clock
A model that uses DNA comparisons to estimate the length of time that two species have been evolving independently
Mutations that have an effect on the organisms phenotype.,..
Are affected by natural selection
Neutral mutations…
Accumulate in the DNA of different species at about the same rate
The more similar the DNA sequences of Two species…
The more recently they shared a common ancestor and the more closely they are related in evolutionary terms
DNA and RNA are similar….
Across all forms of life
What are the six kingdoms
Eubacteria, archaebacteria ,Protista ,fungi ,Plantae , and Animalia
The three domains ,which are all larger than kingdoms , are
Eukarya, bacteria, archae
Are the members of the domain bacteria unicellular or multicellular and prokaryotic or eukaryotic
Unicellular and prokaryotic
What Do the members of the domain bacteria have in their Cell walls
They have thick rigid cell walls that surround a cell membrane, cell walls contain a substance known peptidoglycan
What are the kingdoms in the domain bacteria
Eubacteria
Are the members of the domain Archae unicellular or multicellular and prokaryotic or eukaryotic
Unicellular and prokaryotic
What are the cell walls and cell membranes of the members of the domain Archae like?
Their cell walls lack peptidoglycan and the cell membranes contain unusual lipids that are not not found in any other organism
What are the kingdoms of the domain Arcadia
Archaebacteria
Are Bacteria autotrophic or heterotrophic
Autotroph or heterotroph
Are Archaebacteria autotrophic or heterotrophic
Both
Are protists autotrophic or heterotrophic
Both
Are fungi autotrophic or heterotrophic
Heterotrophic (absorption)
Are plants autotrophic or heterotrophic
Autotrophic
Are animals autotrophic or heterotrophic
Heterotrophic
Which kingdoms are in the domain eukarya
Protista, fungi, Plantae ,a and animalia
Most diverse kingdom is…
Protista
Are protists unicellular or multicellular and eukaryotic or prokaryotic
Mostly unicellular but some multicellular , but all eukaryotic
Protists are
All eukaryotic organisms that aren’t plants, fungi, or animals
Fungi feed on…
Dead or decaying organic matter