Asap if you want to pass a slow-moving vehicle, you should do it a. as soon as you see the opportunity b. only if your path is secured by traffic cones c. when the vehicle is traveling below 10 mph d. only if you can do so without speeding

Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer