Which of the following is FALSE regarding air masses?
A) An air mass initially reflects the characteristics of its source region.
B) They may dominate half the depth of the troposphere.
C) Air masses tend to maintain their original characteristics as they migrate from their source regions.
D) They are homogeneous in terms of temperature and humidity.
C
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Approximately ________ million years ago, the Earth began to have an oxygen rich atmosphere.
A. 359 B. 444 C. 250 D. 2500
Levees are artificial, not natural formations
Indicate whether this statement is true or false.
Anaerobes cannot survive low-oxygen conditions.
Answer the following statement true (T) or false (F)
A species of lizard has gone extinct. All of the following may have contributed to this extinction EXCEPT ________
A) introduction of a species that competed for food resources B) increased genetic diversity within the species C) climate change D) inbreeding E) habitat destruction by humans