Name
Date
Class
What Is an Animal?
On a separate sheet of paper, list the main functions of an animal. Then explain how
scientists classify animals into different groups.
141C
Name
Date
Class
What Is an Animal?
Understanding Main Ideas
Answer the following questions in the spaces provided.
1. What are the main functions of an animal?
The main functions of an animal are
2. Give examples of two animal adaptations and explain how each one
helps an animal perform one of its main functions.
a.One animal adaptation is
It helps an animal
b.Another animal adaptation is
It helps an animal________________________________________________________________
3. How do scientists classify animals?
Scientists classify animals according to
4. When you look at a branched diagram that classifies animals, how
can you tell how closely related two groups of animals are?
Animal groups on
Building Vocabulary
Match each term with its definition by writing the letter of the correct definition in the
right column on the line beside the term in the left column.
5.
homeostasis
a. animal without a backbone
6.
vertebrate
b. keeping internal conditions stable
7.
adaptation
c. animal with a backbone
8.
invertebrate
d. structure or behavior that helps an animal perform its
functions
141D