Some plastics accumulate poisons such as DDT and PCBs to levels as high as a ________ times their concentrations in seawater
A) fifty
B) one hundred
C) one thousand
D) one million
E) one billion
D
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What is the function of the thick outer coverings of rattlesnakes and insects in desert biomes?
a. to prevent sunburn b. to reduce water loss through evaporation c. to prevent drowning during typical desert flash floods d. to prevent sunburn and reduce water loss e. for protection during competitive action during mating seasons
The amalgamation of Pangaea may have played an important role in the Permian extinction because
the shallow marine environment was greatly reduced. Indicate whether the statement is true or false.
China is the world's most populous country, with 1.37 billion people in 2015.
Answer the following statement true (T) or false (F)
The Maori welcome ceremonies that include pressing noses together are called:
A) moko B) haka C) hongi D) wharenui E) corrohoree