An organism that has had its DNA modified in a laboratory rather than through cross-pollination or other forms of evolution is known as a(n)
A) GMO.
B) DDT.
C) HBO.
D) GOP.
E) CSA.
Answer: A
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What evidence indicates oxygen started accumulating in the atmosphere and oceans during the Proterozoic? How does
this evidence support the accumulation of oxygen? What will be an ideal response?
A basic cause of environmental problems results from the fact that companies using resources have to pay for the cost of the harmful environmental costs of supplying their products.
Answer the following statement true (T) or false (F)
Read the following exert from a USGS report concerning a recent earthquake and answer this question.Special Report: The Hector Mine Earthquake, 10/16/1999A M7.1 earthquake occurred at 2:46 a.m. local time on 10/16/1999.The event was located in a remote, sparsely-populated part of the Mojave Desert of California, approximately 47 miles east-southeast of Barstow and 32 miles north of Joshua Tree (see map next page). The initial magnitude estimate of 7.0 was upgraded to 7.1 on October 18, 1999, based on in-depth analysis of "teleseismic" data recorded worldwide.The earthquake occurred on the Lavic Lake fault, one of a series of north-northwest trending faults through the eastern Mojave shear zone. Geologists from the U.S. Geological Survey and Southern California Earthquake Center were able
to fly over the rupture (which is within the Twenty Nine Palms Marine Base) on the afternoon of October 16 and documented a 40-km long surface rupture. The aerial photos show an apparent maximum offset of 3.8-4.7 meters. These preliminary estimates for both fault length and slip are consistent with expectations for a magnitude 7.0 earthquake, although the slip is perhaps somewhat larger than average. The fault is one of a series of closely spaced, northwest-trending, right-lateral strike slip faults that traverse this portion of the Mojave Desert. Together, these faults within what is termed the Mojave Shear Zone serve to relieve a small portion of the stresses that build up along the boundary between the Pacific and North American tectonic plates.An interesting aspect of the Hector Mine earthquake is that it occurred only 7 years after the 1992 Landers and Joshua Tree earthquakes, which occurred on similar faults within the Mojave Shear Zone. This apparent clustering of earthquakes may be purely coincidental, but scientists are conducting research to see if this kind of earthquake behavior is typical of this region. That is, perhaps many of the Mojave Shear Zone faults produce earthquakes within a short time interval (perhaps spanning several hundred or more years), followed by several thousands of years of quiescence. 
What evidence was used to identify the exact location of the fault responsible for the earthquake?
A. Surface rupture
B. Teleseismic data
C. Reported by local population
D. Previous history of earthquakes
The Columbia River has 119 dams and a fish problem. If you were the person in charge of determining what to do, what would you decide? Would you seek to free up the river in favor of the fish, or would you make a few accommodations for the fish and leave the dams in place? Explain.
What will be an ideal response?