This bacterium causes acne:
a) Streptococcus mutans
b) Propionibacterium acnes
c) Staphylococcus Epidermidis
d) Clostridium perfringens
Answer: b) Propionibacterium acnes
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If immersion oil was replaced with water, what would happen?
A. The refractive index of water would be greater than air but less than oil, improving resolution less than oil. B. The refractive index of water would be less than that of air, decreasing resolution. C. The refractive index would increase, improving resolution. D. There would be no difference.
Which antibody induces inflammation after antigen
invasions? a. IgG b. IgA c. IgD d. IgM e. IgE
All genes encode proteins
Indicate whether the statement is true or false
Which of the following statements regarding animal digestive systems is false?
A) We expect that an herbivore will have a longer alimentary canal than a carnivore of similar body size. B) Meat is more difficult to digest than vegetable matter because of its protein content. C) Many herbivorous animals have cellulose-digesting microbes in their colon and cecum. D) When cows chew their cud, it helps to soften and break down plant fibers, making these more accessible to digestion by microbes.