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Animals
Lesson 1 and 2
Question | Answer |
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Homeostasis | The condition in which an organism's internal environment is kept stable in spite of changes in the external environment |
Adaptation | An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment |
Vertebrate | An animal with a backbone |
Invertebrate | An animal without a backbone |
Tissue | A group of similar cells that perform a specific function |
Organ | A body structure that is composed of different kinds of tissues that work together |
Radial symmetry | A body plan in which any number of imaginary lines that all pass through a central point divide the animal into two mirror images |
Bilateral symmetry | A body plan in which a single imaginary line divides the body into left and right sides that are mirror images of each other |