Name: ________________________ Date:_________ Period:__________ #:_____
Chapter 9: Classifying and Exploring Study Guide
1. Define a cell.
The smallest units of an organism that carries on the functions of life.
2. List the organisms are classified in order.
Kingdom, Phylum, Class, Order, Family, Genus, and Species
3. What is Aristotle most famous for doing? Where did he live?
Placed organisms into 2 groups: plants and animals. From Greece.
4. How many organisms did Linnaeus’s system give us? Where did he live?
Binomial Nomenclature – 2 names per organism (most important
contribution). From Sweden.
5. What is a unicellular organism? Provide one example.
An organism with only one cell. Example: Amoeba
6. What is a multicellular organism? Provide one example.
An organism with some or many cells. Example: grass, worm
7. Define a cladogram. What is it similar to?
A branched diagram that shows the relationship among other
organisms. Similar to family tree.
8. Define reproduction. Provide one example.
Production of an offspring. Example: 2 horses mate = a foal (baby
horse)
9. Define development. Provide one example.
Growing into something. Example: a tadpole grows into a frog.
10. Define homeostasis. Provide examples of how our bodies maintain homeostasis.
Name: ________________________ Date:_________ Period:__________ #:_____
Ability to maintain steady conditions when the outside conditions
change. Examples: sweating, shivering, change of blood flow.
11. What is an internal stimulus? Provide examples.
Response to feelings within you. Example: getting a drink of water,
eating food when you’re hungry, laying down when you don’t feel
well.
12. What is an external stimulus? Provide example.
Changed in an organisms environment that affects the organism.
Example: running away when you see a spider, putting on a jacket
when it’s cold outside.
13. What does a scientific name of organisms consist of? What is the first name? What is the
second name?
Genus and specific name. First name = Genus. Second name =
Species
14. What is the scientific name for a bear?
Ursus arctos
15. Define a dichotomous key. What are its functions?
Uses pair of descriptions to help the user identify an organism. Avoid
errors, groups that are similar go together, and has more descriptive
information.
16. Why do multicellular organisms have a greater level of organization?
Because groups of cells function together.
17. Living things with more than one cell develop what kind of functions?
Specialized functions
18. What do all living things need?
Energy
19. What is another term for living things?
Organisms
Name: ________________________ Date:_________ Period:__________ #:_____
20. Where do organisms get energy?
Originally from the sun
21. Why do organisms need food?
To provide energy for life activities such as growth and reproduction.
22. List the 6 characteristics that describe living things.
1. Organized into one or more cells. 2. Interact with their
surroundings. 3. Use energy. 4. Grow and development. 5.
Reproduce.
23. Identify and explain four reasons why scientists use two-word scientific
names for organisms rather than familiar names. (ESSAY)
1.
2.
3.
4.
Avoids mistakes: 2 word names are very specific.
Gives information about classification and evolutionary history.
Gives specific, descriptive information about living things.
Allows scientists to consistently and easily organize information.