Which sequence correctly lists the taxonomic classification levels from the most inclusive to the most specific?
Kingdom → Class → Phylum → Order→ Family → Genus→ Species
Kingdom→ Phylum → Class → Order →Family →Genus→ Species
Kingdom→ Order→ Class→ Family→ Genus → Phylum → Species
Species → Genus→ Family → Order → Class→ Phylum→ Kingdom
The Correct Answer is B
A. Kingdom → Class → Phylum → Order → Family → Genus → Species: This sequence incorrectly orders the taxonomic ranks because Phylum precedes Class in the hierarchical system. Classifying organisms requires moving from broadest to most specific, beginning with Kingdom, followed by Phylum, not Class.
B. Kingdom → Phylum → Class → Order → Family → Genus → Species: Kingdom is the most inclusive category, followed by Phylum, which groups organisms with similar body plans. Class, Order, and Family progressively narrow the classification, while Genus groups closely related species, and Species represents the most specific level, defining a single, reproductively isolated population.
C. Kingdom → Order → Class → Family → Genus → Phylum → Species: This sequence disrupts the proper hierarchical flow by placing Order before Class and Phylum after Genus, which contradicts the structured progression from broad to specific categories.
D. Species → Genus → Family → Order → Class → Phylum → Kingdom: This sequence lists the taxonomic ranks in reverse order, moving from the most specific (Species) to the most inclusive (Kingdom). While it represents a hierarchy, it does not represent the sequence from most inclusive to most specific.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Pili, also called sex pili, are hair-like appendages on the surface of many bacteria that are longer than fimbriae and play a key role in bacterial conjugation. During conjugation, a donor bacterium uses a pilus to attach to a recipient cell and transfer genetic material, typically plasmids, which can carry genes for antibiotic resistance or other traits. Fimbriae, in contrast, are shorter and primarily function in adhesion to surfaces or host tissues, not in genetic exchange. The structural and functional distinction between pili and fimbriae allows bacteria to both attach to environments and share genetic information for survival and adaptation.
Correct Answer is B
Explanation
Ribosomes are cellular organelles responsible for protein synthesis, translating messenger RNA (mRNA) into polypeptide chains. They do not synthesize carbohydrates. Carbohydrate synthesis primarily occurs in the cytoplasm and within organelles like the smooth endoplasmic reticulum and Golgi apparatus, where glycosylation of proteins and lipids takes place. Ribosomes can be free-floating in the cytoplasm or attached to the rough endoplasmic reticulum, facilitating protein production for cellular use or export. Understanding the specific function of ribosomes is essential in cell biology, as confusing protein synthesis with carbohydrate metabolism overlooks the specialized roles of different organelles.
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