In human-dominated ecosystems, which of the following features is often lacking?
A) the presence of positive feedback systems
B) homeostatic regulation
C) the presence of sufficient human infrastructure
D) an ecosystem's ability to grow sufficient food
E) drought resistant regulation
B
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Which of the following rock photographs depicts a felsic igneous rock?
A)
B)
C)
D)
Living matter cannot function without energy, the capacity to reproduce
Indicate whether the statement is true or false
The primary source of energy for the earth's atmosphere is:
A. latent heat released during the formation of hurricanes
B. the sun
C. erupting volcanoes
D. energy from within the Earth
The best way to block Asian carp from moving into the Great Lakes from the Illinois River would be the closing of locks and dams in and near Chicago; however, these waterways are not being closed because
A) Republicans in the U.S. Congress are concerned about taxes on the rich. B) as major transportation links for the region, they are important for the economy of St. Louis. C) too many Asian carp are already clogging the locks and dams and cannot be removed. D) as major transportation links for the region, they are important for Chicago's economy. E) the economies of neighboring states depend on the Chicago-area locks and dams.