Which happened during the paleozoic era? a. bacteria were the dominant life-forms. b. no life was present yet on earth. c. bony fish evolved. d. sponges and invertebrates dominated the seas.

Which of the following terms describes the layers of air surrounding the earth ?

What factors influenced brazil's current and future economic strength?

Why are young eastern european democracies at an increased risk for turmoil during a global recession? a) anger against increased democracy b) failure of the free market system c) government corruption d) lack of from the e.u.