Which of the following statements most accurately describes transformation in bacteria?
A. Transformation is the creation of a strand of RNA from a DNA molecule.
B. Transformation is the infection of cells by a phage DNA molecule.
C. Transformation is the creation of a strand of DNA from an RNA molecule.
D. Transformation is the assimilation of external DNA into a cell.
Ans: D. Transformation is the assimilation of external DNA into a cell.
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Activation energy is the energy
A) required to transform all reactants into their reactive state. B) given off as the products in a chemical reaction are formed. C) absorbed as ?G0' moves from negative to positive. D) needed by an enzyme to catalyze a reaction without coenzymes.
Rickets is caused by
a. overexposure to UV radiation. b. an excess of calcitonin. c. inadequate amounts of vitamin D. d. an excess of ascorbic acid. e. a fetal deficiency of thyroid hormone.
From a human developmental standpoint, what is the significance of Hox genes?
What will be an ideal response?
Which of the following would be the strongest evidence for or against the necklace's effectiveness?
A) A bar graph comparing the percentage of players who do with the percentage of players who do not wear the necklace B) A scatter plot showing days on the disabled list and percentage of players who do or do not wear the necklace C) A bar graph illustrating the satisfaction levels of the players who wear the necklace D) A bar graph comparing batting averages of the players who wear the official titanium necklace and those who were unknowingly wearing a fake titanium necklace