Asexual reproduction results in greater reproductive success than does sexual reproduction when _____
A) pathogens are rapidly diversifying
B) there is some potential for rapid overpopulation
C) a species is expanding into diverse geographic settings
D) a species is in stable and favorable environments
D
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Eukaryotes have three nuclear RNA polymerases. The primary function of RNA polymerase II is transcription of _____
A) only rRNA-coding genes B) only tRNA-coding genes C) both rRNA- and tRNA-coding genes D) protein-coding genes
Approximately how long would it take for CO2 levels to return to nineteenth century levels if we cut emissions by 90% immediately?
A. hundreds or thousands of years B. 1 month C. 6–12 months D. 10 years E. 100 years
Which of the following statements best describes DNA polymerase?
A. It is an enzyme required to produce a primer needed for DNA replication. B. It is an enzyme that catalyzes the addition of nucleotides to the 5? end of a growing DNA strand. C. It is an enzyme that requires the presence of a small double-stranded nucleic acid primer to catalyze the addition of nucleotides to the 3? end of a growing DNA strand. D. It is an enzyme required to glue pieces of DNA fragments together. E. It is an enzyme that polymerizes to the DNA and keeps the replication fork open.
Which answer best describes energy flow in biological systems as described in the text?
a. glucose ? G3P ? NADH ? ATP b. bacteria ? archaea ? plants ? animals c. NAD+ ? NADH ? ADP ? ATP d. G3P ? glucose ? ATP ? NAD+ e. pyruvate oxidation ? glycolysis ? fermentation ? citric acid cycle