In the Olestra experiment, the people who ate
the Olestra potato chips were the
a. experimental group.
b. control group.
c. research group.
d. hypothetical group.
e. independent group.
A
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In humans, the antigen-presenting cells include all of the following EXCEPT ________.
A. macrophages B. B cells C. dendritic cells D. eosinophils
Social behavior depends on
a. genetic similarity. b. bonding early in youth. c. communication. d. diversity. e. polymorphism
What is misleading about commercials that show "scientific proof" that laundry detergent X is better than another leading brand?
A) We are shown only one tee-shirt becoming whiter in each detergent, not 20 tee-shirts in each detergent. B) We do not know whether the same amount of each detergent was used for washing. C) We do not know if everything besides the detergents was the same (machine used, type of stains, etc.). D) All of the above are aspects that are misleading.
The reason for using Taq polymerase for PCR is that _____
A) it is heat stable and can withstand the heating step of PCR B) only minute amounts are needed for each cycle of PCR C) it binds more readily than other polymerases to the primers D) it has regions that are complementary to the primers