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Questions and Answers
What is the correct order of hierarchical classification from the most specific to the most general?
What is the correct order of hierarchical classification from the most specific to the most general?
- Kingdom → Phylum → Class → Order → Family → Genus → Species
- Kingdom → Class → Order → Family → Genus → Species
- Phylum → Class → Family → Genus → Species → Kingdom
- Species → Genus → Family → Order → Class → Phylum → Kingdom (correct)
Which kingdom includes organisms with cells that do not have a true membrane-bound nucleus?
Which kingdom includes organisms with cells that do not have a true membrane-bound nucleus?
- Kingdom Eukaryotae
- Kingdom Plantae
- Kingdom Animalia
- Kingdom Prokaryotae (correct)
Which of the following statements about viruses is true?
Which of the following statements about viruses is true?
- Viruses cannot reproduce outside living cells. (correct)
- Viruses are classified within the five-kingdom system.
- Viruses possess a complete cellular structure.
- Viruses are categorized as prokaryotes.
Which of the following features is characteristic of eukaryotic organisms?
Which of the following features is characteristic of eukaryotic organisms?
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What forms the basic building blocks of viruses?
What forms the basic building blocks of viruses?
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Study Notes
Hierarchical Classification
- Closely related species are grouped together in a hierarchical system
- The system progresses from the most specific (species) to the broadest (kingdom)
- The order of classification is: Species, Genus, Family, Order, Class, Phylum, Kingdom
Five Kingdoms
- The modern classification system uses five kingdoms.
- Kingdom Prokaryotae: Organisms in this kingdom have cells that lack a true membrane-bound nucleus. Their DNA is free within the cells.
- Other Four Kingdoms: The remaining kingdoms consist of eukaryotes, organisms whose cells have true nuclei surrounded by membranes.
Viruses
- Viruses are not classified into any of the five kingdoms.
- They are not cellular organisms, but rather particles composed of DNA or RNA encased in a protein coat.
- Viruses can only reproduce inside other living cells.
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