BIOLOGY 172 Lecture Notes - Lecture 3: Acidophile, Rudolf Virchow, Cell Theory
Document Summary
Cell theory and evolution imply that all species are descended from a single common ancestor at the root. Using molecules to build a tree of life. Difficult to use visual comparisons our ability to accurately estimate relatedness using macroscopic observations is poor. Best molecules to compare/contrast would be ones that all living organisms have. All living organisms use dna as genetic material and convert information in chromosomes to proteins through translation: translation carried out by ribosomes (composed of rrna and. Proteins: so, closely related species should have rna sequences more similar than those of distant species, rrna genes can be used to produce phylogenetic tree showing evolutionary relationships, archaea. Thermophiles: may thrive at 90 c, a few at 110 c. Some archaea and bacteria also like the cold or alkaline ph: cells. Lowest level of biological organization that can perform all activities required for life.
