What was the energy source in the Miller-Urey simulation of conditions on the early Earth?
What will be an ideal response?
the electrodes that simulated lightning
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Mycoplasma pneumoniae
A. does not cause pneumonia despite its name. B. is one of the causes of atypical pneumonia. C. causes pneumonia only in conjunction with viral activity. D. causes pneumonia more often than Streptococcus pneumoniae.
Which of the following statements best describes the function of the xylem?
A. It transports water from the roots to the stems and leaves. B. It transports food between the leaves and the roots. C. It transports minerals from the roots to the stems and leaves. D. It transports both water and minerals from the roots to the stems and leaves. E. It transports water from roots to leaves and food from leaves to roots.
A solution having a pH of 6 would:a
have equal concentrations of hydrogen ions and hydroxide ions. b. have a higher concentrations of hydroxide ions than hydrogen ions. c. be slightly acidic. d. be slightly basic. e. be neutral.
Which mutations can interfere with the proper insertion of a protein in the plasma membrane?
A. A nonpolar amino acid to a polar amino acid within a cytoplasmic domain B. A polar amino acid to a nonpolar amino acid within a transmembrane domain C. A polar amino acid to a nonpolar amino acid within a cytoplasmic domain D. A nonpolar amino acid to a polar amino acid within a transmembrane domain