Biological Classification and Naming

What is the system called that is used to write scientific names?

• Polytomial nomenclature

• Binomial nomenclature

• Monomial nomenclature

• Trinomial nomenclature

Answer explanation

The system used to write scientific names is called binomial nomenclature. It is a concise and standardized way of naming species, consisting of two parts: the genus name and the species name.

Which part of a scientific name is always capitalized?

• Both parts

• None of the above

• Species epithet

• Genus

Answer explanation

The genus part of a scientific name is always capitalized. It helps to identify the group to which the species belongs.

What is the highest-level category in biological classification?

• Phylum

• Class

• Order

• Domain

Answer explanation

The highest-level category in biological classification is the Domain. It encompasses all other categories such as Phylum, Class, and Order.

What method involves examining the external and internal structures of organisms to reveal phylogeny?

• None of the above

• Fossil evidence

• Molecular analysis

• Morphological analysis

Answer explanation

Morphological analysis involves examining external and internal structures of organisms to reveal phylogeny. It is the correct method for determining phylogenetic relationships.

What is a cladogram?

• None of the above

• A type of DNA sequence

• A branching diagram representing evolutionary relationships

• A type of fossil

Answer explanation

A cladogram is a branching diagram representing evolutionary relationships.

Which domain includes single-celled microorganisms found in extreme environments?

• Archaea

• Eukarya

• Protista

• Bacteria

Answer explanation

Archaea is the domain that includes single-celled microorganisms found in extreme environments.

Which kingdom includes multicellular organisms that are autotrophs?

• Plantae

• Animalia

• Fungi

• Protista

Answer explanation

The kingdom that includes multicellular autotrophs is Plantae.

What is the main characteristic of organisms in the Fungi kingdom?

• Multicellular

• Autotrophic

• Unicellular

• Heterotrophic

Answer explanation

The main characteristic of organisms in the Fungi kingdom is being heterotrophic, meaning they obtain nutrients from organic matter in their environment.

Which kingdom includes a diverse group of mostly single-celled organisms?

• Protista

• Plantae

• Fungi

• Animalia

Answer explanation

The kingdom that includes a diverse group of mostly single-celled organisms is Protista. It encompasses a wide range of organisms, including algae, protozoa, and slime molds.

What is the main characteristic of organisms in the Archaebacteria kingdom?

• Heterotrophic

• Autotrophic

• Multicellular

• Unicellular

Answer explanation

Organisms in the Archaebacteria kingdom are unicellular, meaning they consist of a single cell.