A volcanic island arc is caused by the collision of two continental masses (e.g. a continental-continental convergent
plate boundary).
a. True
b. False
False
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Which of the following scenarios would be most susceptible to mass movements?
A) steep slope, underlain by siltstone and mudstone B) steep slope, underlain by sandstone and conglomerate C) shallow slope, underlain by siltstone and mudstone D) shallow slope, underlain by sandstone and conglomerate
an earthquake causes the size of a deer population to drop rapidly over a short period. Allele frequencies shift. What mechanism of evolution does this situation illustrate?
a. natural selection b. artificial selection c. genetic drift- founder effect d. genetic drift- bottleneck effect e. migration f. sexual selection g. disruptive selection
Recent evidence from polar ice core analysis shows that, until now, carbon dioxide levels have never exceeded ________ ppm in the last 800,000 years
A) 300 B) 25 C) 200 D) 500 E) 1000
Country A has approximately 100,000 children between the ages of 0 and 14, although it has a high infant mortality rate It also has 202,000 elderly people who have retired from work, although most continue to live in multi-generational households with their children and grandchildren. Country A also has 310,000 people who can participate in the workforce. We can use these data to calculate that the
A) dependency ratio is about 50 percent. B) life expectancy ratio is about 50 percent. C) population ratio is high. D) dependency ratio is about 67 percent. E) dependency ratio is about 33 percent.