Which of the following functional groups is not found in pantothenic acid?
A) amide
B) amine
C) primary alcohol
D) secondary alcohol
B
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Mid-ocean ridge volcanism produces what type of volcanic rock?
A) basalt B) andesite C) rhyolite D) tephra
Lake Springfield in the city of Springfield, Illinois, is a busy place where people swim and fish. The lake also supplies drinking water for Springfield residents and cooling water to a nearby coal-fired power plant
Beautiful homes surround most of the lake. Over the past 15 years, the bacterium Leptospira, commonly found in agricultural animal waste, has been detected in this lake water, and some people have become sick. The contamination of the lake by Leptospira may best be prevented by A) better control of agricultural nonpoint source pollution of the lake. B) doubling the amount of fluoride added to the city's public water supply. C) restricting swimming in the lake to only weekends. D) requiring the power company to find another source for its cooling water.
Lightning never occurs in the tropics
Indicate whether the statement is true or false
The present oceans have been created during the last ________.
A. 20 million years B. 2 billion years C. 225 million years D. 2 million years E. 2250 million years