Humoral immunity involves all the following except:
A) antibodies.
B) antigens.
C) NK cells.
D) plasma cells.
C) NK cells.
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The genotypic definition of race states that races are populations of the same species in which allele frequencies differ by ____
a. 15%-20% b. 85% c. 1 in 1000 nucleotides d. 25%-30% e. 5%-10%
Select the correct sequence of steps as energy is extracted from glucose during cellular respiration.
A. glycolysis ? citric acid cycle ? acetyl CoA ? electron transport chain B. glycolysis ? acetyl CoA ? citric acid cycle ? electron transport chain C. acetyl CoA ? citric acid cycle ? electron transport chain ? glycolysis D. electron transport chain ? citric acid cycle ? glycolysis ? acetyl CoA E. citric acid cycle ? electron transport chain ? glycolysis ? acetyl CoA
What is one consequence of long-term exposure to carbon monoxide, found in environmental tobacco smoke?
A) damage to hemoglobin B) protection from bronchitis C) higher-than-average birth weights of babies born to smoking mothers D) diminished brain function in infants and children
How would you recognize an antibiotic-producing soil bacterium on a plate crowded with other bacteria? The bacterial colony producing the antibiotic would be __________.
a. surrounded by a clear area b. red or yellow c. star-shaped d. visible as masses called mycelia e. characterized by pseudopods