Explain the response of Canadian cod populations in the area of the Grand Banks after the 1992 moratorium on cod fishing
What will be an ideal response?
Cod populations did not immediately rebound after the initial moratorium, so in 1994, the Canadian government extended the moratorium. Meanwhile, populations of capelin (a fish that is normally preyed upon by cod) grew rapidly and began preying upon young cod. After cod populations did not rebound by 2003, the Canadian government extended the moratorium indefinitely. A portion of the Grand Banks was reopened for cod fishing in 2009 upon evidence of a slight recovery in cod numbers. A 2011 study showed that cod populations had climbed to 34% of their historic numbers (up from 5%). The rebound is attributed to the moratorium and the fact that capelin population numbers had crashed as a result of the combination of outstripping their food supply and being fished by fishermen.
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Scientists use evidence from fossils and ice cores to support the accepted theory for most evolutionary change, referred to as
A. inheritance of acquired characteristics. B. synthetic selection. C. natural selection. D. functional diversity. E. punctuated equilibrium.
In the northeastern section of the United States, many homes during the winter months are heated by furnaces that burn fuel oil. Calculate the amount of CO2 released into the atmosphere by 100,000 homes if each house consumes on average 800 gallons of fuel oil during this period.
What will be an ideal response?
The major fossil fuels differ in the amount of carbon dioxide they emit into the atmosphere when burned. From worst to least, these are
A) coal, natural gas, and oil. B) coal, oil, and natural gas. C) oil, natural gas, and coal. D) natural gas, oil, and coal.
Maritime tropical air masses are a significant source of precipitation for much of the eastern portion of the United States
Indicate whether the statement is true or false