Less than 1 percent of the world's fresh water is available for human use, usually 'stored' in lakes, rivers, streams, groundwater and aquifers or as atmospheric water vapor.
a. true
b. false
a. true
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How are island arc and continental arc magmas similar?
a) Both are formed near spreading centers. b) Both are formed near hot spots. c) Both are formed near transform boundaries. d) Both are formed near subduction zones.
Secondary rainbows occur when ____
A) two internal reflections of light occur in each raindrop B) light refracts through ice crystals C) a single internal reflection of light occurs in each raindrop D) light refracts through a cloud of large raindrops
The term ________ defines an urban settlement that has been legally incorporated into an independent, self-governing unit
A) village B) city C) state D) metropolis E) country
Some drugs, such as taxol and Tamiflu that are currently used with great success to treat cancer and viral infections,
A) are derived from wild plants. B) represent the intrinsic value of wild species. C) are derived from genetically modified cultivars that combine together traits of several plants. D) were discovered as mutations in the development of new cultivars of wheat.