Classification: domains, kingdoms and scientific names

Grade 9 Science Worksheet - Building Confidence

Circle the best answer.

1. Read this first

   The dog's groups from largest to smallest (real facts)

   step	group of the dog
   1	Eukarya
   2	Animalia
   3	Chordata
   4	Mammalia
   5	Carnivora
   6	Canidae
   7	Canis
   8	lupus

2. 1.

   Ari reads the dog's groups from largest to smallest. Which level of classification is step 1, Eukarya?

   • Class: a group inside each phylum
   • Phylum: a group inside each kingdom
   • Domain: the first and largest group
   • Kingdom: the first and largest group
3. 2.

   Bo reads the dog's groups from largest to smallest. Which level of classification is step 5, Carnivora?

   • Phylum: a group inside a kingdom, holding classes
   • Class: a group inside a phylum, holding orders
   • Order: a group inside a class, holding families
   • Family: a group inside an order, holding genera
4. 3.

   Esme reads the dog's groups from largest to smallest. Which level of classification is step 7, Canis?

   • Genus: the first word of a scientific name
   • Species: the second word of a scientific name
   • Order: a group that holds several families
   • Family: a group that holds several genera
5. 4.

   “real groups, not to scale” Jun reads a tree of life. Split W is at its base and makes the three groups shown. Which level of classification are these groups?

   • Kingdoms: the largest groups, made at the first split
   • Phyla: groups made inside each kingdom
   • Classes: groups made inside each phylum
   • Domains: the largest groups, made at the first split

6. Tree of life (real groups, not to scale)

   The base of the tree makes three groups. Group Bacteria holds Escherichia coli and Deinococcus radiodurans. Group Archaea holds Haloarcula marismortui. Group Eukarya holds the honey mushroom and the garden pea.

7. 5.

   Kira reads a tree of life. Which organism sits in the same domain as Escherichia coli?

   • the garden pea
   • Haloarcula marismortui
   • the honey mushroom
   • Deinococcus radiodurans
8. 6.

   Luz reads a tree of life. How many domains does it show?

   • Three: Bacteria, Archaea and Eukarya
   • Two: Archaea are counted inside Bacteria
   • Five: one domain for each organism shown
   • Eight: one domain for each level of classification

9. A cell card (real facts)

   feature	what the cell has
   nucleus	no
   peptidoglycan in the wall	yes

10. 7.

    Pia reads a card for a cell. Which domain fits this cell?

    • Archaea: no nucleus, so it fits Archaea as well
    • Eukarya: its DNA sits inside a nucleus
    • Animalia: a kingdom of animal cells
    • Bacteria: no nucleus, and a wall with peptidoglycan

11. Parts of a scientific name (real facts)

    part	word
    first word	Canis
    second word	lupus

12. 8.

    Ren reads the scientific name of the wolf. Which word is the genus?

    • Canis: the first word, written with a capital letter
    • Wolf: the common name is the genus
    • Canis lupus: both words together make the genus
    • lupus: the second word, which names the wolf by itself

13. Garden pea (real facts)

    part	word
    genus	Pisum
    species	sativum

14. 9.

    Tala writes the scientific name of the garden pea. Which spelling follows the rules?

    • Pisum Sativum: both words capitalized
    • pisum sativum: both words lowercase
    • pisum Sativum: species capitalized, genus lowercase
    • Pisum sativum: genus capitalized, species lowercase

15. Scientific names (real facts)

    organism	scientific name
    wolf	Canis lupus
    garden pea	Pisum sativum

16. 10.

    Zee reads two scientific names. Which two levels make up a scientific name?

    • Species alone: one word, such as lupus
    • Family and genus: two words, such as Canidae Canis
    • Domain and kingdom: two words, such as Eukarya Animalia
    • Genus and species: two words, written in italics