R plasmids help prevent the spread of virulence factors
Indicate whether the statement is true or false.
Answer: FALSE
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Choose the description below that best matches the current model of RNA polymerase holoenzyme.
A. A core enzyme composed of five sigma factors bound by a polypeptide chain. B. A core enzyme composed of five polypeptides bound by ribosomes. C. An open complex or "bubble" formed by DNA, mRNA, and RNA polymerase. D. A core enzyme composed of five polypeptides bound by a transcription factor.
The primary cause of human population growth following the Industrial Revolution was
a. an increase in death rates. b. a decrease in death rates. c. an increase in birthrates. d. a decrease in birthrates e. more children being born to women over 35 years of age.
The feathers of Sinosauropteryx prima are
hypothesized to have served for
a. flight. b. insulation. c. scaring predators. d. camouflage. e. sexual attraction
Linnaeus classified organisms based on
1.DNA sequences. 2.protein sequences. 3.morphological characteristics. 4.evolutionary history. 5.existing phylogenetic trees.