SECTION
17.1
THE LINNAEAN SYSTEM OF CLASSIFICATION
Study Guide
Organisms can be classified based on physical
similarities.
VOCABULARY
taxonomy
taxon
binomial nomenclature
genus
CHAPTER 17
The Tree of Life
KEY CONCEPT
MAIN IDEA: Linnaeus developed the scientific naming system still used today.
Fill in the concept map with details about Linnaean taxonomy.
Linnaean taxonomy
classifies
1.
names
4.
based on
Copyright © McDougal Littell/Houghton Mifflin Company.
2.
using a system called
5.
into groups called
3.
MAIN IDEA:
which gives each species a
6.
Linnaeus’ classification system has seven levels.
7. How are the seven levels of Linnaeus’ classification system organized?
8. Describe the trend in the levels, or taxa, as you move down from kingdom to species.
The Tree of Life
Study Guide Book
Study Guide
175
CHAPTER 17
The Tree of Life
Section 17.1 STUDY GUIDE CONTINUED
Fill in the seven taxa of the Linnaean classification system into the appropriate boxes below.
a.
b.
c.
d.
e.
f.
g.
MAIN IDEA:
The Linnaean classification system has limitations.
9. Why did Linnaeus base his system of classification on physical similarities alone, as
opposed to including molecular and genetic similarities?
10. Why are physical similarities among species not always the result of being closely
11. Why do scientists today rely on molecular and genetic similarities to classify organisms?
Vocabulary Check
12. Taxonomy is the science of
13. Words from the
and
organisms.
language are used in binomial nomenclature.
14. In the binomial nomenclature naming system, each species is given a unique scientific
name that includes a
176
Study Guide
name and a
descriptor.
The Tree of Life
Study Guide Book
Copyright © McDougal Littell/Houghton Mifflin Company.
related?