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Biology Grade 6-8 Answer Key

Biology: Taxonomic Classification Ranks from Broadest to Narrowest Practice

Practice ordering the levels scientists use to classify living things

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Biology: Taxonomic Classification Ranks from Broadest to Narrowest Practice

Practice ordering the levels scientists use to classify living things

Biology - Grade 6-8

Instructions: Read each problem carefully. Use the taxonomic ranks domain, kingdom, phylum, class, order, family, genus, and species. Show your thinking in the space provided.
  1. 1

    Write the eight main taxonomic ranks in order from broadest to narrowest.

    A common memory phrase is Dear King Philip Came Over For Good Soup.

    The eight main taxonomic ranks from broadest to narrowest are domain, kingdom, phylum, class, order, family, genus, and species.
  2. 2

    Which taxonomic rank is broader: family or order? Explain your answer.

    Order is broader than family because an order can include several related families.
  3. 3

    Place these ranks in order from broadest to narrowest: class, species, kingdom, genus, phylum.

    Start with the rank that can include many different phyla.

    The correct order from broadest to narrowest is kingdom, phylum, class, genus, species.
  4. 4

    A red fox has the scientific name Vulpes vulpes. Which part of the name is the genus, and which part helps identify the species?

    The genus is Vulpes. The full species name is Vulpes vulpes, and the second word vulpes is the specific name that helps identify the species.
  5. 5

    Complete the missing ranks in this sequence: domain, kingdom, phylum, class, order, _____, genus, species.

    Family comes after order and before genus.

    The missing rank is family. The complete sequence is domain, kingdom, phylum, class, order, family, genus, species.
  6. 6

    Two organisms are in the same genus but different species. Are they more closely related than two organisms in the same family but different genera? Explain.

    Yes, two organisms in the same genus are usually more closely related because genus is a narrower rank than family.
  7. 7

    Look at this classification for a domestic cat: Animalia, Chordata, Mammalia, Carnivora, Felidae, Felis, catus. Add the missing broadest rank at the beginning and label each rank.

    Animals are made of cells with nuclei, so they are in domain Eukarya.

    The missing broadest rank is domain Eukarya. The labels are domain Eukarya, kingdom Animalia, phylum Chordata, class Mammalia, order Carnivora, family Felidae, genus Felis, and species catus.
  8. 8

    Which rank is the most specific: class, family, species, or kingdom? Explain your answer.

    Species is the most specific rank because it identifies the smallest and narrowest group in the list.
  9. 9

    A student wrote this order: species, genus, family, order, class, phylum, kingdom, domain. Is the student ordering ranks from broadest to narrowest or narrowest to broadest? Explain.

    Domain is the broadest rank, and species is the narrowest rank.

    The student is ordering the ranks from narrowest to broadest because the list begins with species and ends with domain.
  10. 10

    Fill in the comparison sentence: A kingdom is broader than a _____, and a genus is broader than a _____. Choose from species, phylum, domain, class.

    A kingdom is broader than a phylum, and a genus is broader than a species.
  11. 11

    The gray wolf is classified as Eukarya, Animalia, Chordata, Mammalia, Carnivora, Canidae, Canis, lupus. Which rank is Canidae, and which rank is Canis?

    Family comes right before genus in the classification sequence.

    Canidae is the family, and Canis is the genus.
  12. 12

    Create a classification ladder with these ranks in the correct order: order, domain, species, class, family, kingdom, genus, phylum. Then mark the broadest and narrowest ranks.

    The correct classification ladder is domain, kingdom, phylum, class, order, family, genus, species. Domain is the broadest rank, and species is the narrowest rank.
LivePhysics™.com Biology - Grade 6-8 - Answer Key