Jen has fair skin, and both her mother and her aunt have been treated for skin cancer. This coming weekend, Jen and her friends are planning an all-day outdoor hike near a high-elevation mountain lake; she expects there will be a mix of sun and shade on the trail and at the lakeshore beach. She is looking forward to the hike, but she wants to avoid getting a sunburn or any sun damage. Jen should do all of the following before leaving for the hike EXCEPT buy or borrow a broad-brimmed hat. consult the forecast for UV index to help determine how sunny it will be. visit a tanning salon to get a light tan to protect her skin. pack a full bottle of sunscreen in her backpack. A. after climbing a hill and sweating heavily.
B. 30 minutes before sun exposure begins.
C. 2 hours after sun exposure begins.
D. All answer choices are correct.

Which of these is likely to be the best source of valid health information?

Which action occurs in the third stage of cell division a. the nuclear material of a cell is copied exactly b. the nuclear membrane disappears c. the cell forms two nuclei or d. the nuclear material separates, with half moving to wither side of the cell

Lyme disease is caused by a bacterium transmitted to people by deer ticks. deer ticks are almost never born infected with the bacterium, but they can pick it up from feeding on an infected host in any of the tick's three successive stage of development: larva, nymph, adult. once infected, a tick remains infected through any subsequent developmental stages, but since a tick feeds on only one host in each stage, it follows that . people can be infected only by being bitten by a tick that is either in larval stage or in the nymph stage b. people cannot be infected by a tick that picked up the lyme disease bacterium in the adult stage c. it is not possible for a person to be infected by a tick that is in the nymph stage or by a tick that was infected with the bacterium while in the nymph stage d. people infected with the lyme disease bacterium cannot transmit bacterium to adult deer ticks e. only deer ticks that are adults can transmit the lyme disease bacterium to people