An experiment can show: a. how one behaves naturally. b. biological basis. c. effectiveness. d. cause and effect.

Use the drop-down menu to complete the sentence. increased competition between producers of a good may lead to

American troops were worried about cantracting in cuba a. yellow fever b. hepatitis c. polio

Historians believe that animals drawn in cave paintings during the paleolithic era could have represented each of the following except a a. successful hunt b. domesticated pet c. god that was worshipped d. way to obtain an animal's spirit select the best answer from the choices provided