How many stereoisomers are possible for 1,4-heptadiene?
A) 2
B) 4
C) 7
D) 8
A
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Which of the following amino acids is needed in the synthesis of membrane lipids?
A) cysteine B) glycine C) serine D) threonine
Which of the following is produced in the Earth's upper atmosphere as a result of excited atoms and molecules giving off visible light?
A. prominences B. flares C. solar wind D. aurora
What events caused so much damage along the north coast of Venezuela in 1999?
A) A landslide shook loose a large piece of the mountains that caused the water in the reservoir to flood local towns. B) Torrential rains caused debris flows and flash floods that raced through cities. C) The slow movement of slopes downhill broke apart houses but did not kill any people. D) Overgrazing caused a loss of grass cover and resulted in severe soil erosion.
A severe reduction in wetlands in the San Joaquin Valley of California played a significant role in the
severity of the 1977 duststorm. What caused the reduction of wetlands? What will be an ideal response?