At body temperature, which of these combinations is most likely to result in the digestion of proteins?
Select one:
a. water, pepsin
b. HCl, pepsin
c. bile, pepsin
d. sodium bicarbonate, pepsin
e. pepsin, HCl, sodium bicarbonate
b. HCl, pepsin
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In 1928, Frederick Griffith's experiments with Streptococcus pneumoniae suggested that
A) bacteria do not incorporate the DNA of other bacteria. B) attenuated R (rough) bacteria easily revert to the wild type (virulent). C) DNA was conclusively the molecule of heredity. D) heat-killed bacteria could somehow "transform" live bacteria. E) all of the above
Single-celled parasites known as ____ infect insects, fish, and humans (especially those with compromised immune
systems).
a. amoebae b. red algae c. microsporidia d. dinoflagellates e. apicomplexans
Four of the five structures listed below are parts of
the same sense organ. Select the exception. a. ommatidium b. retina c. crystalline cone d. photoreceptor e. lens
Didinium are carnivorous protista, that prey on other, slower moving protista. A student is studying Didinium feeding rates after 1, 3, and 5 days of food deprivation. How should she classify the organism she is studying?
What will be an ideal response?