An expert is someone a. expends the least amount of effort for the greatest skills. b. expends the least amount of efficiency for the greatest practice. c. expends the least amount of energy for the greatest result. d. expends the least amount of experience for the greatest movements.

How do the uv rays cause damage?   what exactly causes the skin to burn;   can you be more specific about this mechanism?   3. how do photosensitive medications increase a person's sensitivity to sunlight and therefore increase their risk of getting burned?     what kind of medications can increase photo-sensitivity, can you think of some examples?

Explain why you would or would not have a lasik surgery if you wore contacts or glasses.describe how public opinions related to this surgery have changed over the years.in your own words, explain this surgery as though you are explaining it to someone who has no knowledge of the procedure.

True or false? the usa has one of the safest food supplies in the world