The population growth rate. a. increases if the death rate is not too high. b. decreases if the birth rate is not too high. c. measures the change in a population's size over time. d. tells whether or not a nation should stop allowing immigrants to move in.

In a economy individuals answer the three basic and the central authority or leaders have little say in the economy.

What are the similarities and differences in the way geologists and biologists approximate the age of the earth? justify your response in two or more complete sentences.

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation