An invertebrate is an animal that has no spine, or backbone.
Some invertebrates exhibit bilateral symmetry .
An animal or plant that exhibits bilateral symmetry produces a mirror image only if a line is drawn through it at one particular place. An animal or plant that exhibits radial symmetry produces a mirror image if any line is drawn dividing it into two equal parts. Materials Procedures Adaptations Discussion Questions Extensions Evaluation Suggested Readings Links Vocabulary Academic Standards Credit Printable version of the lesson plan in rich text format. Use our Teaching Tools to create custom worksheets, puzzles and quizzes about this topic. Back to Top 1.