PBDEs are ____
a. permitted in many European countries but banned in the United States
b. permitted in only one European country and in only 11 states in the United States
c. banned worldwide but are still being used illegally
d. banned in many European countries but permitted in most states in the United States
e. banned in many Europeans countries and all states in the United States
d
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Briggs and King demonstrated nuclear transplantation in
A. sheep. B. frogs. C. pigs. D. lizards. E. fish.
Which of the following is a disadvantage to expressing genes in E. coli?
A. Bacteria containing recombinant genes rarely will grow in commercial fermenters. B. Some eukaryotic proteins will not fold properly when expressed in E. coli. C. Efficient methods exist for transforming DNA into the bacteria but not for extracting DNA. D. The regulatory sequences that govern gene expression are not well understood and rarely express cloned genes at high levels. E. Host bacteria are difficult and expensive to grow.
Which of the following are required for evolution to occur?
a. genetic variability in a population b. selection for adaptive traits c. high level of individual fitness d. sexual reproduction e. genetic variability in a population and selection for adaptive traits
Sponges are
A. prokaryotic bacteria. B. the simplest animals. C. the most complex protists. D. plants. E. not alive.