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Unit 6: Inheritance, Variation, and Evolution
6.4 Classification of Living Organisms
6.4.1 Classification Systems
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Cards (36)
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