What can cause hydrogenous calcium carbonate deposits?
A) Evaporation
B) A decrease in the acidity of seawater
C) An increase in seawater temperature
D) All of these choices
D
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The zone of lighted ocean in which marine autotrophs tap more energy than they use to stay alive is called: a. the photic zone
b. the mesopelagic zone. c. the euphotic zone. d. the abyssal zone.
The central thesis of the theory of organic evolution is that the same diversity of species on Earth
today existed in the past. Indicate whether the statement is true or false.
The evolution of the horse involved major changes from Hyracotherium, including increases in size
and development of one toe. Indicate whether the statement is true or false.
The 1997 Kyoto Protocol went into effect in 2005 with only seven of the world's 194 nations not ratifying the agreement. Which country did not ratify it?
A. The Netherlands B. Canada C. the United States D. Germany E. Switzerland