Which of the following elements, essential to life, is a trace element?
A) phosphorus
B) carbon
C) iodine
D) calcium
C
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Bioremediation is:
A. the use of microorganisms to treat open wounds B. the use of microorganisms to break down harmful substances such as sewage, pesticides, petrochemicals, and explosives C. the use of bacteria to attack cancer cells D. the use of microorganisms to attack pathogenic bacteria E. none of the other options presented
Fungi form functional associations with which of the following?
A. Phototrophic microbes B. Plant roots C. Plant roots and phototrophic microbes D. Animals
Which characteristic possessed by Archaeopteryx was least likely present in their dinosaurian ancestors?
a. teeth b. feathers c. a long tail with many vertebrae d. three clawed fingers on each hand e. a forked breastbone
In the 20th century, scientists harnessed the natural metabolic reactions of bacteria to make ________ for the first time in an industrial setting.
A. soy sauce B. acetone C. wine D. cheese E. alcohol