The first fish evolved about 50 million years ago

a. True
b. False


False

Environmental & Atmospheric Sciences

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Where are tornadoes most common?

A. North Africa B. the U.S. C. Brazil D. Australia

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Which of Earth's major extinctions was the most extensive, eliminating 70 percent of all terrestrial organisms and up to 95 percent of marine organisms?

A) Cambrian Explosion B) Permian Extinction C) Cretaceous Extinction D) Late Devonian Extinction

Environmental & Atmospheric Sciences

Why is the hypothetical pattern seen here?

What will be an ideal response?

Environmental & Atmospheric Sciences

The type of rock shown in this photograph is

A. shale. B. breccia. C. sandstone. D. conglomerate.

Environmental & Atmospheric Sciences