A change in the acidity of mountain lakes would most likely be a result of
(1) ecological succession of the area at the top of the mountain
(2) the introduction of new species into the lakes
(3) air pollution from smoke stacks miles away
(4) planting grasses and shrubs around the lakes
Answer: (3) air pollution from smoke stacks miles away
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The major climate type in the Russian region is subarctic, and the major biome is boreal forests
a. True b. False Indicate whether the statement is true or false
Global warming appears to be thawing the permafrost as indicated by ________
A) increased surface waters in the Arctic B) houses sinking into the ground in Alaska C) disappearing lakes in the Arctic D) all of the above Word Analysis. Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.
Which resource is nonrenewable?
A. Geothermal energy B. Solar energy C. Freshwater D. Copper E. trees
The genes of an organism make up its ________, and the traits of an organism make up its ________
A) phenotype; chromosomes B) enzymes; genotype C) genotype; phenotype D) phenotype; genotype