Anemia can result from a deficiency of
a. calcium.
b. chlorine.
c. iodine.
d. iron.
e. phosphorus.
D
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The molarity of a solution is
A. a measure of solute concentration. B. the weight of a solid substance. C. often expressed as grams per unit volume. D. reflects a measure of the amount of oil dissolved in water. E. a scientific term for determining the solubility of a substance in water.
What is the most common blood type in the U.S. population?
A) type O- B) type B+ C) type AB- D) type O+
If the parents are AO and BO genotypes for the ABO blood group, their children could include which of the following genotypes?
A. AO and BO only B. AO, BO, and AB only C. AA, BB, and AB only D. AO, BO, and OO only E. AO, BO, AB, and OO only
The half-life of carbon-14 is approximately 5,700 years. Using this information scientists have been able to determine the age of some artifacts left by humans. A scientist wants to know approximately how old a piece of wood was that she found on the floor in an old cave that had recently been discovered. She removed the wood (with permission) to her laboratory. Her wood sample contained 2 grams of carbon-14. If the age of the wood was determined to be 22,800 years old, how much carbon-14 originally existed in this piece of wood?
A. 16 grams B. 32 grams C. 4 grams D. 8 grams E. 12 grams