Classifying Life: The Taxonomy of Organisms

The video explores the diversity of life, highlighting the complexity of classifying nearly 2 million described species. It discusses the evolution of classification systems from Linnaeus' two-kingdom model to the modern three-domain system: Archaea, Bacteria, and Eukarya. The video explains binomial nomenclature, a universal naming system using genus and species names. It outlines the taxonomic hierarchy, from domain to species, and describes the unique and shared characteristics of different kingdoms, emphasizing the genetic distinctions between Archaea and Bacteria.

What are the three domains into which all life is classified?

• Plants, Animals, Fungi

• Archaea, Bacteria, Eukarya

• Prokaryotes, Eukaryotes, Viruses

• Mammals, Reptiles, Birds

Who introduced the modern conventions of taxonomy in the 1700s?

• Charles Darwin

• Gregor Mendel

• Carl Linnaeus

• Louis Pasteur

What is the purpose of binomial nomenclature?

• To classify organisms into domains

• To provide a two-word scientific name for organisms

• To describe the habitat of organisms

• To determine the diet of organisms

What was a major change in classification after Linnaeus' two-kingdom system?

• Focus on organism diet

• Introduction of binomial nomenclature

• Classification based on habitat

• Division into three domains

Which of the following is the correct order of the hierarchy of life from most general to most specific?

• Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain

• Kingdom, Domain, Phylum, Class, Order, Family, Genus, Species

• Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

• Domain, Phylum, Kingdom, Class, Order, Family, Genus, Species

Which category is more specific than 'Family' in the hierarchy of life?

• Genus

• Class

• Order

• Phylum

What is a shared characteristic of all kingdoms within the domain Eukarya?

• They all have prokaryotic cells

• They all have eukaryotic cells

• They all are single-celled organisms

• They all are multicellular organisms

Which domains consist of single-celled prokaryotes?

• Eukarya and Bacteria

• Archaea and Bacteria

• Bacteria and Eukarya

• Eukarya and Archaea

What did DNA evidence reveal about the relationship between Archaea and Bacteria?

• Archaea and Bacteria are not related to Eukarya

• Archaea and Bacteria are equally related to Eukarya

• Archaea are more closely related to Eukarya than to Bacteria

• Archaea are more closely related to Bacteria than to Eukarya

Which domain is more closely related to Eukarya based on genetic evidence?

• Neither is related

• Archaea

• Bacteria

• Both are equally related