What is the cut off age for dating fossils by
their Carbon 14 content?
a. 60,000 years
b. 12,000 years
c. 6,000 years
d. 2,000 years
e. 500 years
A
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Reductive dechlorination is important in the breakdown of chlorinated xenobiotics because
A) anoxic conditions develop rapidly in polluted habitats. B) oxygen is not present in most soils. C) aerobic breakdown of xenobiotics is not possible. D) only cometabolism occurs aerobically.
A phenotypic technique that examines the ability of bacteriophages, which are viruses capable of infecting and lysing bacterial cells, to attack certain strains is:
a. biotyping. b. antibiograms. c. bacteriocin typing. d. bacteriophage typing.
Living organisms are members of all of the levels listed; however, rocks are components of ________
A) the community B) an organism C) the population D) the ecosystem
Exocrine glands:a
have a duct. b. cannot secrete mucus. c. are made of endothelial tissue. d. secrete hormones. e. transport products through interstitial fluid.