6.4.1 Classification Systems

• What is the definition of classification in biology?

  Organizing organisms by similarities
• Classifying organisms allows us to study their evolution and ecology.


  True
• The Linnaean system groups organisms based on their physical characteristics
• Why is the Phylogenetic system considered more scientifically robust than the Linnaean system?

  Reflects evolutionary history
• The Linnaean system uses hierarchical categories to classify organisms.

  True
• The modern classification system uses cladistics to create groups of organisms sharing a common ancestor.
• What is the broadest taxonomic rank?

  Domain
• Arrange the taxonomic ranks from broadest to most specific:

  1️⃣ Domain

  2️⃣ Kingdom

  3️⃣ Phylum

  4️⃣ Class

  5️⃣ Order

  6️⃣ Family

  7️⃣ Genus

  8️⃣ Species
• Match the classification system with its key feature:

  Linnaean System ↔️ Observable physical traits

  Phylogenetic System ↔️ Evolutionary relationships
• In the Linnaean system, organisms are grouped into hierarchical categories such as kingdom, phylum, class, order, family, genus, and species
• What is the main advantage of the Phylogenetic system over the Linnaean system?

  Reflects evolutionary history
• The Phylogenetic system provides a static classification of organisms.

  False
• What does the Phylogenetic system emphasize in classifying organisms?

  Evolutionary relationships
• The Phylogenetic system provides a high representation of evolutionary history.


  True
• The most specific taxonomic rank is species
• What are the three primary methods used to classify organisms?

  Physical traits, evolutionary relationships, ecological roles
• Evolutionary relationships rely on genetic information from DNA analysis.

  True
• Classification helps us organize the vast biodiversity on Earth
• What are the two main historical classification systems in biology?

  Linnaean and Phylogenetic
• The Phylogenetic system reflects the evolutionary tree of life.

  True
• Classification helps us understand the relationships between organisms
• What is the modern classification system based on?

  Phylogeny
• Match the classification system with its basis:

  Linnaean System ↔️ Physical traits

  Phylogenetic System ↔️ Evolutionary relationships
• The most specific taxonomic rank is species
• Organisms in the same species can interbreed and produce fertile offspring.


  True
• What is the primary basis of classification in the Linnaean system?

  Physical characteristics
• The Linnaean system reflects evolutionary history.

  False
• The Phylogenetic system groups organisms into clades
• Match the classification system with its basis:

  Linnaean System ↔️ Physical traits

  Phylogenetic System ↔️ Evolutionary relationships
• In the Linnaean system, organisms are grouped into hierarchical categories.
• What is the highest taxonomic rank in the hierarchical system?

  Domain
• Organisms in the same genus can interbreed and produce fertile offspring.

  False
• Evolutionary relationships are used to group organisms into clades
• What is the species name for humans?

  Homo sapiens
• Escherichia coli belongs to the Bacteria domain.


  True
• The scientific name for broccoli is Brassica oleracea