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B Lesson 1
4th grade Science
Question | Answer |
---|---|
vertebrate | an animal with a backbone. |
invertebrate | an animal without a backbone. |
symmetry | the way an animal's body parts match up around a point or central line. |
radial | an animal's body part that extend outward from a central point. |
Bilateral | an animal that has only two sides that are mirror images. |