Bioventing is a scientific technology that uses microorganisms to break down components of fuels in groundwater. Bioventing is an example of
A) genetic engineering.
B) bioremediation.
C) algae harvesting.
D) bacteria culturing.
Answer: B
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Which of the following species of Mycobacterium causes a chronic disease of the skin, mucous membranes, and nerve tissue but has not yet been cultivated in vitro?
a. M. paratuberculosis b. M. lepraemurium c. M. phlei d. M. leprae
Which one of the following statements about endosymbiosis and the origin of the eukaryotic cell is FALSE?
A. Mitochondria are the descendants of purple bacteria. B. The chloroplasts of red and green algae are the descendants of cyanobacteria. C. Algae incorporated prokaryotic cells that became chloroplasts, but never acquired mitochondria. D. Many compartments of the eukaryotic cell are derived from the endomembrane system. E. Ultimately, both the chloroplast and the mitochondria of eukaryotes are descendants of prokaryotic cells.
The difference between a stable isotope and a radioisotope is that:a
the stable isotope emits radiation. b. the radioisotope emits radiation. c. the stable isotope emits light. d. the stable isotope absorbs radiation. e. the radioisotope has an unequal number of protons and electrons.
Which of the following provides the best evidence that modern humans are evolving?
A. In humans of northern European descent, blue-eyed individuals are at greater risk of vitamin D deficiency than brown-eyed individuals. B. Adult humans of American descent eat fruits and vegetables grown all over the world. C. Adult humans of northern European descent can readily digest lactose. D. Modern humans have opposable thumbs.