In 1979, Jimmy Carter signed the Alaska Wilderness Act creating the ________, an area currently under threat in Congress of losing its protection to gas and oil drilling
A) Alaska Wilderness Refuge (AWR)
B) Arctic National Park (ANP)
C) Alaska National Wildlife Refuge (ANWR)
D) Arctic Wilderness and Wildlife Preserve (AWWP)
C
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In a food chain, biomagnification is the result of
A) bioaccumulation up to higher trophic levels. B) bioaccumulation down to lower trophic levels. C) higher levels of toxins than in the organisms living in that region. D) rapid elimination of toxic wastes from the body.
A(n) ____________________ is a large parcel of the atmosphere, sometimes sub-continental in size, that may move over Earth's surface as a distinct, relatively homogeneous entity
Fill in the blank(s) with correct word
Models of climate are only able to reproduce the warming over the last century only if ________ are added.
A. plate tectonics B. greenhouse gases C. population changes D. solar radiation
Marine and freshwater aquatic life zones are distinguished by their
A. nutrient concentration. B. dissolved oxygen. C. temperature. D. salinity. E. depth.