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Chapter 4 Animals

Lesson 1

TermDefinition
Homeostasis The condition in which an organism’s internal environment is kept stable in spite of changes in the external environment
Vertebrate An animal with a backbone
Invertebrate An animal without a backbone
Adaptations An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment
Describe the three things that all animals have in common 1. They are multicellular organisms 2. They feed on other organisms 3. They perform the same basic functions
Describe the four functions of animals 1. Obtain food and oxygen. 2. Keep internal conditions stable. 3. Move in some way. 4. Reproduce.
Describe how animals are classified and the three ways these relationships are determined Animals are classified according to how they are related to other animals. These relationships are determined by an animal’s body structure, the way the animal develops, and its DNA.
Created by: user-1995236
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