Lecture 4 Tree of life Flashcards
exam
Phylogeny
Evolutionary histrory of species
infered from fossils , molecules, genes etc
aided by species concept
Phylogeny tree
evo history of a species + relationship between species
hypothesis, based on assumptions
Convergent evolution
Those that look alike may not be related
Do phylogenetic trees show patterns of similarity or descent?
descent
We can assume a species evolved from species next to it on the tree ( true or false)
False , we can only assume that they shared a common ancestor
The order species appear on a tree shows sequence of evolution (true or false)
false
Taxonomy
how organisms are named/ classified
goal : species get a unique name
Biological classification
hierarchal groups aggravated to from groups above
Biological groups classifcation
Dear king phillip came(class) over for good soup
Bacteria
archea
eukaryote
single celled and multicellular
single celled
single celled and multicellular
The differnce between archea and bacteria
The archea can grow in condtions more than 100 celsius ( above boiling point) wheras bacteria can’t
Location of Dna
Bcateria–> nucleoid, circular dna
Euks –> nucleus , linear dna
Fusion of archean + bacterium
euks have cytoskeleton allow them to change shape evidence = euks share Dna with proks
Domain archea
found everywhere ( also no known pathogens)
able to adapt to broad habitats b/c they have various structures and characteristics
motility
ability to mover yourself
