The designation of winds is referenced from
a. the direction from which they are coming.
b. the direction towards which they are going.
c. folk lore.
d. the need to throw horses overboard.
e. the direction in relation to the observer's path of travel
A
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Some viruses can change geochemical cycles leading to:
a. a change in seawater pH. b. reduction in surface oxygen. c. modification of salinity. d. an effect on global warming. e. increased geothermal activity.
Which one of the following statements is false concerning matter?
A. Matter is anything that has mass and takes up space. B. Air is matter. C. All matter has the same density. D. The phases of matter are determined by the relative amounts of energy in the matter's molecules.
Which of the following is NOT true about conjugation in Archaea?
a. Some strains have plasmids that mediate conjugation between cells, similar to Bacteria. b. Some Archaea form specialized structures for genetic exchange between cells, which does not involve a fertility plasmid. c. Thermococcus produces nanotubes that allow for bidirectional DNA transfer. d. Conjugative plasmids in Archaea encode most of the same tra genes found in Bacteria, thus the mechanism of conjugation is similar.
According to the out-of-Africa hypothesis, when did Homo sapiens migrate to Europe and Asia?
A. 10,000 years before present B. 5 million years before present C. 1000 years before present D. 100,000 years before present E. 1 million years before present