Classification Review

Which hierarchical taxonomic category is the most inclusive?

• Domain

• Order

• Family

• Species

Answer explanation

The most inclusive hierarchical taxonomic category is the Domain, which encompasses all life forms. It is broader than Order, Family, and Species.

Which hierarchical taxonomic category is the least inclusive?

• Domain

• Order

• Family

• Species

Answer explanation

The correct choice is 'Species' because it is the least inclusive hierarchical taxonomic category, focusing on individual organisms within a genus.

Identify the taxonomic group that contains the all of the others

• Kingdom

• Class

• Order

• Species

Answer explanation

The taxonomic group that contains all others is the Kingdom. It is the broadest category in the classification system, encompassing all other groups such as Class, Order, and Species.

Identify the taxonomic group that would contain the least amount of diversity

• Domain

• Phylum (Division)

• Genus

• Species

Answer explanation

The taxonomic group that would contain the least amount of diversity is Species, as it represents the most specific level of classification.

Which answer shows the correct order of the taxonomic hierarchy, from most inclusive to least inclusive?

(Using first letter of each taxon)

• D.K.P.C.O.F.G.S.

• S.G.F.O.C.P.K.D.

• S.O.P.K.C.G.D.F.

• F.D.G.P.S.O.K.C.

Answer explanation

The correct order of the taxonomic hierarchy, from most inclusive to least inclusive, is Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species, which corresponds to D.K.P.C.O.F.G.S.

Which of these pieces of evidence is NOT used for classifying organisms?

• Fossil Record

• Morphology (derived anatomical characteristics)

• Embryology

• Molecular Analyses (chromosomes/macromolecules)

• Acquired Characteristics

Answer explanation

Acquired Characteristics is not used for classifying organisms because it refers to traits acquired during an organism's lifetime and are not inherited.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

Binomial nomenclature includes

these taxa:

_________ and ___________

• Domain, Kingdom

• Kingdom, Phylum

• Family, Genus

• Genus, species

Answer explanation

Binomial nomenclature includes the taxa Genus and species, making the correct choices Genus, species.

This is NOT why scientists classify organisms:

• Organization of immense diversity for better studying purposes

• Common names are misleading

• Universal naming system (like metrics)

• Show relationships/evolutionary pathways among organisms

• To name organisms similarly

Answer explanation

The correct choice is 'To name organisms similarly' because scientists classify organisms to show relationships and evolutionary pathways, not to name them similarly.

About what percentage of the estimated 10 million species on Earth have been classified?

• 50% (5 million)

• 25% (2.5 million)

• 90% (9 million)

• 10% (1 million)

Answer explanation

The correct choice is 10% (1 million) because only a small fraction of the estimated 10 million species on Earth have been classified.

The Killer Whale’s scientific name is

Orcinus orca. What is its genus?

• Orcinus

• orca

Answer explanation

The genus of the Killer Whale is Orcinus, as indicated by its scientific name Orcinus orca.