Under certain circumstances, natural selection can lead to an entirely new species, a process called ____.
A. genetic drift
B. genetic isolation
C. diversification
D. speciation
E. mutation
Answer: D
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The carbon cycle
A) exists independently of the oxygen cycle. B) involves photosynthesis, but not respiration. C) takes place primarily in the lithosphere. D) is dependent upon the sun's energy.
Laurentia and Baltica collided to form Laurasia during the Late Paleozoic
a. True b. False
What is the average rate of seafloor spreading occurring in the Atlantic Ocean and occurring in the Pacific Ocean?
a. The rate of seafloor spreading at the East Pacific Rise is 2 centimeters per year, whereas the rate of seafloor spreading at the Mid-Atlantic Ridge is 15 centimeters per year. b. The seafloor at both the Mid-Atlantic Ridge and the East Pacific Rise is spreading at the rate of 5 centimeters per year. c. The seafloor at both the Mid-Atlantic Ridge and the East Pacific Rise is spreading at a rate of 2 centimeters per year. d. The rate of seafloor spreading at the Mid-Atlantic Ridge is 2 centimeters per year, whereas the rate of seafloor spreading at the East Pacific Rise is 15 centimeters per year. e. The seafloor at both the Mid-Atlantic Ridge and the East Pacific Rise is spreading at a rate of 15 centimeters per year.
Photochemical smog is formed when primary air pollutants interact with ________
A) air B) gases C) water D) moisture E) sunlight