CGS NS 201 Lecture Notes - Lecture 11: Dna Replication, Heterotroph, Sulfur
9 Aug 2018
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Introduced by carl woese 1990: discovered that monera includes two very different groups. Nucleotide sequences of rrna reveal differences between the. Three domains two: bacteria (prokaryotes, archaea (prokaryotes) live in extreme environments: ex. very hot or salty, eukarya (eukaryotes) Bacteria and achaea have yet to be classifies into separate kingdoms. Eukaryotes classified into the following kingdoms: animalia, plantae, fungi, protista. Identify features that reveal evolutionary relationships: anatomic similarities and differences, molecular similarities and differences. Homologous: birds, lizard, human, whale = arm limbs homologous, characteristics found in the common ancestors. Not homologous: octopus, shark (?) fins have same function but are different limbs. Sharks vs dolphins: fish vs mammal, vertebrate make them homologous but considered analogous. Skeleton made of cartilage gills don"t nurse their young no hair. Dolphins bone breath at surface nurse their young hair. Clades that have more in common with each other than other lineages. Will have an additional name beyond genus and species.
