Twin sisters Kate and Elizabeth have deviated septums in their noses that need to be corrected. Their parents decide that, based on cost, the two sisters will have their surgeries at different times. Kate has her surgery just before winter break and Elizabeth has hers a few weeks just before her stressful midterms. Research on stress and the immune system would predict that:

The correct answer is Elizabeth's recovery will be much slower than Kate's

All this because stress is harmful on many levels. Stress harms the person on many levels, hinders and slows down the acceleration of wound healing because stress is a reaction of the body that occurs when it needs to deal with situations. The person needs medical and psychological help to recover.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.