Unsaturated fatty acids are those containing ________ carbon-carbon double bond(s).
A. one or more
B. only one
C. two or more
D. exactly two
Answer: A
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Which of the following statements about El Niño are true?
_____ Occurrence of El Niño is irregular and unpredictable. _____ The immediate effect of El Niño is a weakening in the east-to-west trade winds _____ Weakening in the trade winds results in more upwelling along the Peru-Ecuador coast. _____ El Niño results in the movement of weather systems from the western Pacific eastward. _____ El Niño events in the Pacific can influence weather as far away as Africa.
Which of the following terms means the structure is
located away from the central part of the body? a. dorsal b. inferior c. superior d. proximal e. distal
Pepsinogen is made by ______ cells of the ________.
A. langerhans; pancreas B. bile; liver C. parietal; stomach D. cheif; stomach E. mucus; large intestine
Probably the greatest advantage for the original multicellular organisms was their ability to
A) photosynthesize. B) increase their food intake. C) increase their metabolism. D) use more oxygen. E) avoid predation.