BIOL 1202 : Biol 1202 Exam 2
Document Summary
Concept 26. 4: an organism"s evolutionary history is documented in its genome. Gene duplications & gene families: gene duplication: the production of multiple copies of a gene within the genome. Impotant type of mutation in evolution because it increases the number of genes in the genome. Paralogous genes: the globin gene family has resulted from several gene duplication events. One thing that e. coli and other bacteria have in common with eukaryotes is the presence of: chloroplasts, mitochondria, nucleus, ribosomes. Concept 27. 1: structural and functional adaptations contribute to prokaryotic success: prokaryotes are unicellular, some colonial forms, range in size from 1-5 micrometers, thiomargarita namibiensis (750 micrometers, no membrane-bound organelles, circular chromosomes. Prokaryotic cells have a variety of shapes: the three most common are spheres (cocci), rods (bacilli), and spirals (spirilli) Motility: motile bacteria move by means of flagellae, structurally different from eukaryotic flagella.
