Classification & Taxonomy

DoK 1 – Recall: Which option correctly lists the hierarchical levels of cellular organization in order from simplest to most complex?

• Body → Organ Systems → Organs → Tissues → Cells

• Cells → Tissues → Organs → Organ Systems → Body

• Tissues → Cells → Organ Systems → Organs → Body

• Cells → Organs → Tissues → Body → Organ Systems

Tags

NGSS.MS-LS1-3

DoK 2 – Skill/Concept: In the diagram showing a progression from a cell-like unit to tissue, then an organ (stomach), then multiple organs, and finally a human body, which statement best explains the relationship between organs and organ systems?

• An organ system is a single organ that performs all life functions.

• Organs are groups of similar cells; organ systems are single cells working together.

• Organ systems are coordinated groups of organs that work together to perform complex functions.

• Organs and organ systems are the same level of organization and can be used interchangeably.

Tags

NGSS.MS-LS1-3

Recall: What is the definition of taxonomy as presented in the section? Choose the best description.

• A naming system focused only on species

• A systematic method used to organize and show how organisms are similar

• A technique for measuring population size

• A procedure for ranking ecosystems by biodiversity

Recall: According to the taxonomic hierarchy, which level represents the broadest level of organization?

• Genus

• Species

• Domain

• Family

Recall: Which mnemonic correctly lists the taxonomic hierarchy from broad to narrow as depicted?

• Dear King Philip Came Over For Good Soup

• King Philip Ordered Seven Great Dishes

• Dear Philip King Came Over For Soup Good

• Domain Kingdom Class Phylum Order Family Genus Species

Skill/Concept: The hierarchy can be read in decreasing or increasing order. If you start at class and move to a narrower level, which level comes next?

• Order

• Phylum

• Family

• Domain

Strategic Thinking: A student claims genus is broader than family because the mnemonic lists genus before species. Use the hierarchy to evaluate the claim and select the best conclusion.

• The claim is correct; genus is above family in the hierarchy.

• The claim is incorrect; family is broader than genus and comes before it in the hierarchy.

• The claim is correct only for animals, not plants.

• The claim cannot be evaluated without molecular data.

Strategic Thinking: If an organism is reclassified from kingdom to domain level, what changes in the scope of classification best describes this shift?

• It narrows to include fewer organisms with more similarities.

• It broadens to include more organisms with fewer shared characteristics.

• It stays the same because kingdom and domain are equivalent.

• It alternates between broader and narrower depending on the genus.

Which statement correctly describes binomial nomenclature as used for scientific names?

• It uses a single word that describes an organism’s characteristics.

• It uses two parts: the genus name followed by the species name.

• It lists all taxonomic ranks from kingdom to species in order.

• It assigns numbers to organisms instead of words.

In the scientific name Panthera tigris for the tiger, which formatting rule is correct?

• Both words are capitalized and written in bold.

• Genus is lowercase and species is capitalized.

• Both words are italicized; the genus is capitalized and the species is lowercase.

• Only the species name is italicized; the genus is underlined.