An example of a DNA virus is
a. rhinovirus (cold virus)
b. orthomyxovirus
c. herpes virus
d. HIV
Answer: c. herpes virus
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Bacteria found in the mouth in the first years of life are well-adapted to biofilm formation
Indicate whether the statement is true or false.
What is the main role of red blood cells?
A. Carry sugars B. Carry oxygen C. Aid blood in clotting D. Fight off infections
Cool deserts are dominated by
A) shrubs such as Artemisia tridentata. B) trees such as willow or poplar. C) tall-growth forms of saguaro. D) ground-dwelling succulents.
What is the fate of sperm that are never released?
A) They are stored indefinitely. B) Their cell cycles are stopped in meiosis I. C) They combine to make diploid spermatogonia. D) They continue dividing by mitosis to produce more mature sperm. E) They are destroyed by the body's immune system.