What you’ll learn6 learning objectivesChoose one objective for a focused lesson, or study the complete topic.18.1.1Species concepts• Species concepts: biological, morphological, ecologicalSyllabus objective18.1.2Three domains• Three domains: Archaea, Bacteria, EukaryaSyllabus objective18.1.3Archaea and Bacteria as prokaryotes• Archaea and Bacteria as prokaryotes: differences in membrane lipids, ribosomal RNA, cell wall compositionSyllabus objective18.1.4Eukarya domain taxonomic hierarchy• Eukarya domain taxonomic hierarchy: kingdom, phylum, class, order, family, genus, speciesSyllabus objective18.1.5Characteristic features of kingdoms• Characteristic features of kingdoms: Protoctista, Fungi, Plantae, AnimaliaSyllabus objective18.1.6Virus classification• Virus classification: nucleic acid type (RNA/DNA), single/double strandedSyllabus objective