Evidence of Evolution
Structures that have similar anatomy due to a common ancestor but have different functions.
Homolegous structures
The three major taxonomic groups at the highest level of classification.
Archaea, Bacteria, and Eukarya
The most inclusive (broadest) level of classification
Domains
The collective term for factors such as increased predation and competition for resources, which challenge a population's continued existence.
Environmental challenges
The type of evidence that provides a chronological record of life forms and shows transitional species over geologic time.
Fossil record
The domain assigned to a single-celled organism that lacks a nucleus, thrives in extreme heat, and has unique membrane lipids
Archaea
The four levels that come directly after "Class" in the taxonomic hierarchy.
Order, family, genus, species
The mechanism where one subsect of a species is more well equipt to survive. Thus, they are more likely to reproduce and pass advantageous traits on.
Natural selection
DNA similarities to Species X:
Species Y = 99%
Species Z = 75%
Which species is more closely related to Species X?
Species Y
The kingdom within Eukarya whose organisms are multicellular, motile, and obtain nutrients by ingestion
Animalia
This taxonomic rank, which is less broad than Class and more specific than Family, groups organisms that share a recent common lineage within a larger group.
Order
This is the kind of reproductive isolation, exemplified by the unique finches on a newly discovered island, that is caused by a physical barrier like water or land separation.
Geograohical isolation
Structures that have evolved to perform the same function in unrelated species
Analogous structures
The four kingdoms within Eukarya
Protists, Fungi, Plants, & Animals
List the eight levels of classification in order, starting with the broadest (Domain).
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species?
The main reason an accepted system of biological classification may need to be changed or updated.
new scientific discoveries