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LESSON one
| Question | Answer |
|---|---|
| Homeostasis | the condition in which an organism’s internal environment is kept stable in spite of changes in the external environment |
| Vertebrate | Animal with a back bone |
| invertebrate | animal with no backbone |
| adaptations | an inherited behavior or physical characteristics that help an organism survive and reproduce in its environment |
| three things animals have in common | all animals are multicellular organisms that feed on other organisms and perform the same basic functions |
| four functions of animals | Obtain food and oxygen, keep internal conditions stable ,move in someway, and reproduce |
| animals are classified in a three ways relationships are determined | Animals are classified according to how they are related to other animals. these relationships are determined by animal’s body structure, the way the animal .develops , and it’s DNA |