The view held by both Malthus and Paul Ehrlich suggests that depletion of resource supplies due to greater numbers of people ________
A) will result in exponential population growth
B) will lead to natural selection of the most fit individuals
C) is a problem because some resources are limited and can be depleted
D) is not a problem because new resources can always be found to replace depleted ones
E) is not a problem because disease will limit population size
C
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The fertile soils of the Rift Valley are explained by
A) extensive glaciation during the last ice age. B) volcanic activity associated with the area. C) large-scale agricultural projects. D) voluminous river systems in the area. E) voluminous river systems and extensive glaciation.
Which of the following best matches the description?Top of the layer of water in an aquifer.
A. septic tank B. aquifer C. surface impoundment D. unconfined aquifer E. aquitard F. water diversion G. point source H. landfills I. aquiclude J. artesian aquifer K. confined aquifer L. water table M. nonpoint source N. groundwater mining O. in-stream uses
Radiometric dating is based upon
a. the presence of fossils. b. cross-cutting relationships. c. spontaneous decay of radioactive elements. d. superposition. e. dendrochronology.
Most caves and caverns from above the water table.
a. true b. false