I believe the skeletal system Provides the body with a strong mobile....and to supply the body with minerals
The immune system usually protects from bacteria, injury and diseases.
Answer:
attraction-similarity hypothesis
Explanation:
According to the attraction-similarity hypothesis, the more similarity people share together, the more the attraction they have between each other, which would easily make both develop romantic relationships. For example, if two persons are from the same religion, studied medicine and are practicing in the medical field, they are from similar family background, the possibility of both developing romantic relationship is high as both would typically get attracted to each other or want to be around each other.
You do it before a lab so as to prevent contamination of the materials. You might have things on your hands that might contaminate the experiment and the research. You do it after because you don't want to have things from your experiments on your hands because that can be extremely dangerous.
