Mutation in which of the following genes involved in DNA repair is linked to breast and ovarian cancers?
A. BRCA-1/BRCA-2
B. Hereditary nonpolyposis colon carcinoma (HNPCC)
C. ATM
D. p53
E. Rb
Ans: A. BRCA-1/BRCA-2
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What will be an ideal response?
Supporters of globalization believe that tougher environmental regulations and stricter labor standards are a natural aspect of economic progress.
a. true b. false
In subarctic saltmarshes, scientists have found that the addition of calcium has no effect on productivity, but additional iron does increase productivity. In this example, iron
A. is a precursor to calcium. B. stimulates evapotranspiration. C. biomagnifies in the marsh plants. D. is a limiting factor. E. blocks the effect of calcium.