Across
- 2. chosen standards used to make decisions
- 5. active at night
- 7. system an arrangement of organisms into groups according to criteria
- 9. an animal with a backbone
- 10. plan the overall shape or layout of an organism's body
- 11. a living part of a habitat
- 12. a nonliving part of a habitat
Down
- 1. symmetry a property by which a shape can be folded in half so that the sides mirror each other
- 3. a scientist who organizes living things according to a classification system
- 4. a smaller body part that extends from the main body part
- 6. symmetry a body plan in which parts are arranged in a circular pattern around the center
- 7. to arrange things into groups by their similarities
- 8. an animal without a backbone