Download Document

Name ______________________________ Class __________________ Date __________________
Unit 1 Lesson 5 Directed Reading
Circle the letter of the best answer for each question.
1. What is the name for placing things into groups based on similar characteristics?
a. grouping
b. classification
c. studying
d.
listing
2. What do scientists learn by classifying living things?
a. which living thing is strongest
b.
the characteristics of different species
c. which species has the most members
d.
how species get along
3. What two groups did scientists divide living things into long ago?
a. living and nonliving
b.large and small
c. hairy and hairless
d. plants and animals
4. What do taxonomists do?
a. only take photographs of animals
b. only name and photograph living things
c. describe, classify, and name living things
d. only take photographs of plants
5. How many levels of classification do scientists use today?
a. eight
b. seven
c. six
d.
five
6. What do closely related living things share?
a. size only
b. shape only
c. many characteristics
d. color and size only
Fill in each blank with the word from the boxes that best completes the sentence.
kingdoms
families
classes
species
7. All living things in a domain are sorted into ______________________.
8. Kingdoms are sorted into phyla, and phyla into ______________________.
9. Each class is separated into orders, which are then separated into ______________.
10. Families are sorted into genera, and genera are sorted into ___________________.
11. What kind of name is specific to each living thing?
a. common name
b. nickname c.
scientific name
d.
last name
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt science and Technology
9
Classification
Name ______________________________ Class __________________ Date __________________
12. How are members of Domain Eukarya different from members of Domain Archaea and
Domain Bacteria?
a. Members of Domain Eukarya are less complex than the other domains.
b. Members of Domain Archaea and Domain Bacteria are multicellular.
c. Members of Domain Eukarya have cells have nuclei and membrane-bound organelles.
d. Members of Domain Bacteria and Domain Archaea make their own food.
13. What is the first part of a scientific name?
a. the order name
b.the genus name c. the kingdom name
d. the species name
14. What is the second part of a scientific name?
a. the order name
b.the genus name
c. the kingdom name
d. the species name
15. What is the scientific name for the house cat?
a. Felis domesticus
b.Elephas maximus c. Puma concolor
d. Canis lupus
16. How do scientists classify living things that do not fit into an existing category?
a. leave the living thing alone
b. try to change the living thing
c. destroy the living thing
d. create a new category
17. Why do classification systems change over time?
a. There are changing environments.
b. We discover more plant species.
c. There are changes in food sources.
d. Increased knowledge of genetics leads to reclassification.
18. How are Euglena classified?
a. They are bacteria because they have a flagellum.
b. They are a plant because they make their own food.
c. They are an animal because they don’t have a cell wall.
d. They are protists because they don’t fit into any other kingdom.
19. Scientists use dichotomous keys to
a. name organisms
b. identify organisms
c. count organisms
d. catch organisms
20. What do dichotomous keys use to identify organisms?
a. pairs of questions
b.pairs of arrows
c. pairs of statements
d. pairs of pictures
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt science and Technology
10
Classification