BIOLOGY 207 Lecture Notes - Lecture 2: Homeostasis, Central Dogma Of Molecular Biology, Alphaproteobacteria
Document Summary
Discussion questions (slide 12): little stick tree: describe the general relationships of the 3 domains of life. Eukaryotes and archaea shared the most recent common ancestor, and a more distant common ancestor with bacteria. Yes, as both the cyanobacteria (chloroplasts) and alphaproteobacteria (mitochondria) came from the bacterial domain, so ultimately they must have shared a common ancestor. Distinct separation from the rest of the environment (ie membrane enclosed: polymerized fatty acids and proteins, homeostasis. Main theories of origin of life: life coming from outside of earth and seeding earth, chemical/evolutionary, creationism/intelligent design. Discovering rna that was able to catalyze reactions, called ribozymes, brought about idea that rna was first and preceded the dna. Prokaryotes are not considered a clade because they do not share a common ancestor that other groups do not also share; there is not an ancestor common to only bacteria and archaea.
