Which of the following helps to determine the time it takes to empty the stomach?
a. fat content
b. acidity of chyme
c. both fat content and acidity of chyme
d. pepsin concentration
e. gastrin concentration
C
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Cyanobacteria and purple bacteria both obtain energy from light. However, only the ________ are capable of releasing ________
A) cyanobacteria / organic compounds B) cyanobacteria / oxygen C) purple bacteria / organic compounds D) purple bacteria / oxygen
Blue light has ________ energy than red light and is ________ by a green leaf.
A. more; reflected B. less; absorbed C. more; absorbed D. less; reflected
To date, the preferred weapons of mass destruction for terrorists have been:
A) nuclear. B) chemical. C) explosive. D) biologic.
Which of the following is NOT associated with an electron microscope?
A) an electron beam B) magnetic fields C) a prism D) a fluorescent screen E) a vacuum