Which nations in Europe currently are most at risk from acid rain?
A) Poland and the Czech Republic
B) Spain and Portugal
C) Italy and Switzerland
D) Ireland and Iceland
E) Albania and Greece
A) Poland and the Czech Republic
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Aquaculture is the world's fastest growing type of food production.
Answer the following statement true (T) or false (F)
Which of the following statements regarding transcription and translation is true?
A. mRNA includes the bases A, C, G, and T. B. A codon consists of a sequence of two nucleotides. C. A tRNA molecule includes a codon sequence and carries a single amino acid. D. An RNA transcript may contain sections that are removed before translation.
Geologists know that radioactive dating methods are valid
A) because they are consistent with proposed theories. B) because they have been compared with dates determined by other methods and have been found to correlate well. C) because they have been compared with dates determined by other methods and have the same exact dates. D) because the instruments always work well when performing laboratory tests.
Oceanic upwelling is caused by density differences in the water mass. Indicate whether the statement is true or false