Fats will dissolve in ethanol. Ethanol is an
example of a
a. solute
b. solution
c. solvent
d. salt
e. ion
C
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Describe the enzymatic digestion that takes place in each structure of the digestive tract
What will be an ideal response?
A current news story describes a cruise ship in the Caribbean with an outbreak of diarrheal illness, affecting hundreds of people. With all of those people in a small area, opening and closing doors, using handrails, etc, you are trying to figure out what infectious agent may be the cause. Your most likely guess is that the pathogen is ________.
A. Clostridium difficile B. shiga-toxin-producing E. coli C. cholera D. hepatitis B E. norovirus
All of the following statements about bacteria
are correct with one exception. Select the exception.
a. Bacteria are always single-celled organisms. b. Bacteria have DNA that is not enclosed in a nucleus. c. All bacteria are eukaryotes. d. Some bacteria can live in extreme environments. e. Some bacteria are producers while others are consumers.
Which of the following statements BEST explains the observation that there are more autism cases now than in the past?
a. There are more parents who neglect their children, which is a cause of autism, now than in the past. b. Autism has been selected for in recent generations by natural selection. c. The vaccine for measles, mumps, and rubella has been established as a significant cause of autism. d. Doctors are more aware of the condition and have better techniques for diagnosing and reporting it. e. All of the above are equally good explanations for the observation that there are more autism cases now than in the past.