The Cambrian explosion refers to ____

a. a meteorite impact
b. a sudden appearance of fossils
c. a sudden extinction
d. the start of evolution
e. volcanism that created the Ring of Fire


b

Environmental & Atmospheric Sciences

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The first evidence of shelled organisms is calcareous tubes found with the Ediacaran fauna

a. True b. False

Environmental & Atmospheric Sciences

The Law of the Sea treaty allows coastal countries to claim an EEZ extending up to 20 miles offshore

Indicate whether the statement is true or false.

Environmental & Atmospheric Sciences

In a mountain/valley wind system, mountain breezes occur: a. during nighttime

b. during daytime. c. whenever there is significant cloud cover. d. None of these choices.

Environmental & Atmospheric Sciences

This country is the least densely populated country in the Latin American region

a. Falkland Islands b. Aruba c. Grenada d. St. Lucia

Environmental & Atmospheric Sciences