During chemical evolution, which of the following occurred in the molecules involved?
A) Entropy decreased while potential energy increased.
B) Entropy increased while potential energy increased.
C) Entropy stayed constant while potential energy increased.
Answer: A
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Which of the following statements about medical asepsis is false?
A) Disinfection is a medical aseptic technique. B) Handwashing is a medical aseptic technique. C) Medical asepsis is considered a clean technique. D) The goal of medical asepsis is to exclude all microorganisms from an area.
Which of the following microscope types would be least useful in viewing unstained living cells?
A. Phase contrast B. Interference C. Bright-field D. Dark-field
The function of the rugae of the stomach is to:
a. secrete amylase. b. crush the food. c. increase the holding capacity of the stomach. d. mix the food with gastric juices. e. increase the surface area for secretion.
Thorough cooking of food will prevent all of the following EXCEPT
A) trichinellosis. B) beef tapeworm. C) staphylococcal food poisoning. D) salmonellosis. E) shigellosis.