Consider a country that initially does not interfere with imports of a given good. If the government then imposes a tariff on that good, the supply curve
a. shifts downward.
b. remains unchanged.
c. slopes upward less steeply.
d. shifts upward.
d. shifts upward.
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Where within a eukaryotic cell is ribosomal RNA (rRNA) synthesized?
A) cytoplasm B) lysosome C) mitochondrion D) nucleolus
Why do different mutations accumulate in two species once they diverge?
A. They can no longer mate and swap the mutation. B. The molecular clock runs at different speeds in different species. C. The mutations make the species different. D. convergent evolution E. Natural selection favors mutations in one species over another.
Semen contains all of the following EXCEPT ____
a. sperm b. acidic secretions c. prostaglandins d. fructose e. mucus-rich secretions
Mutagenic chemicals that ____ and are incorporated into DNA or RNA during synthesis are called base analogs
a. resemble nucleotides b. resemble genes c. resemble amino acids d. cause deletion mutations e. cause frameshift mutations