Part B

Response to Touch

4. In your lab report, make a data table like the one shown. Predict the behavior you think will occur to each type of stimulus. As you complete the following steps, record your observations of the flatworm in your data table.

5. CAUTION Touch the flatworm gently. Using a blunt probe, gently touch the posterior end of the flatworm. Notice its response. Now gently touch its anterior end. How does the response compare? What can you conclude from your observations?

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