DOC PREVIEW
SIU BIOL 200B - Tree of Life

This preview shows page 1 out of 2 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 2 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 2 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

Biol 200B Lecture 2Course IntroductionI. Syllabus and Lecture ScheduleII. Course layouta. Diversity of microbes, protists, fungi, plants, animalsb. Organismal biology (anatomy & physiology) of plants & animals c. EcologyThe Tree of LifeII. Phylogenetic tree of lifea. All organisms connected through similarities in their form and function; passage of genes along branches of treeIII. Reading a phylogenetic treeIV. Speciesa. “unit” of biodiversityV. Form and FunctionThe Tree of LifePhylogenetic tree of life: All organisms are connected through similarities in their form and function; the passage of genes as shown through the branches of the tree- 5-100 million species living today- All organisms on earth are genetically related-suggested by morphological, biochemical, and gene sequence data- Phylogeny of organisms- history of organisms’ lineages as they change; speciation historyReading a Phylogenetic TreeRoot-common ancestor of all species on treeBranchNode-speciationPolytomy-more than one branch emerging from one nodeTaxaSister taxa- come from the same node; each other’s closest relativesOutgroup“one-snip” test- they share a derived trait - branches can be rotated without changing relationships - sisters are not ancestorsThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- unless specified, the time axis is relative, not absolute- groups that evolve later are not “more advanced” than those that evolved earlier on - a phylogeny can be drawn for any set of speciesSpecies:- Reproductively isolated set of population- Independent evolutionary lineage- “unit” of biodiversity Form and Function: an organism’s structure or form is designed or shaped in a way that best fitscertain functionsEx: Thermophilic or “heat loving” lizards are common in North American deserts; fish in Antarctica spend their lives at body temperatures near 1.9o


View Full Document
Download Tree of Life
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Tree of Life and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Tree of Life 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?