When fossils are preserved as _______ remains, their original structure and composition are
preserved Fill in the blank(s) with the appropriate word(s).
unaltered
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To reduce flooding risks, an environmentalist is most likely to choose
a. floodplain management b. a flood control dam c. channelization of streams d. artificial levees e. artificial levees combined with channelization of streams
The Amazon Rain forest is the world's largest storehouse of plant and animal species, the majority of which have not yet been discovered or documented
Indicate whether the statement is true or false
________ are characteristics of downcutting streams and a youthful stage of valley evolution
A) Rapids and lots of whitewater B) Meandering channels and natural levees C) Wide floodplains D) U-shaped, cross-valley profiles
As a result of air pollution in urban areas, more children have ________
A) emphysema B) sickle-cell C) asthma D) malaria E) schistosomiasis