What structural feature is associated with the prostaglandin E (PGE) group?
A) a carbonyl at carbon-9
B) a carboxylate at carbon-9
C) hydroxyl groups at carbon-9 and carbon-11
D) none of the above
A
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Bands of alternating strong and weak rocks are likely to produce which type of drainage pattern?
a. radial b. trellis c. dendritic d. rectangular
Which of the following triggers an El Niño event?
A. ocean waters around Indonesia increase in temperature B. Pacific equatorial currents increase in strength C. upwelling increases along the California coast D. trade winds weaken or reverse direction
The relationship between pH and the oxygen carrying ability of hemoglobin is known as which of the following?
A) allosterism B) the Bohr effect C) Dalton's Law D) Perutz's Law
Irregularities in coastal outlines are due, in part, to differences in the way shoreline materials erode. What causes these differences?
What will be an ideal response?