How are living thing organized for study?
Biologists use a classification system to name organisms and group them in a logical manner
What is Linnaeus's system of classifciation?
Includes seven levels (smallest to largest) --> species, genus, family, order, class, phylum, and kingdom
Developed by Carolus Linnaeus; it is a two-word naming system; each species is assigned a two-part scientific name; always written in italics and the first word is capitalized and the second word is lowercased
How are evolutinary relationships important in classification?
Biologists now group organisms into categories that represent lines of evolutionary descent, or phylogeny, not just physical similarities
How can DNA and RNA help scientists determine evolutionary relationships?
The genes of many organisms show important similarities at the molecular level; similarities in DNA can be used to help determine classification and evolutinary relationships
The strategy of grouping organisms together based on their evolutionary history
Characteristics that appear in recent parts of a lineage but not in its older members