The apperance of many new life-forms during the first period of the paleozoic era was probably aided by the development of

In a scientific experiment, a is any factor that can be changed or be changed

Although china’s total economic output, measured by gross domestic product (gdp), is third largest in the world, it is considered a developing nation. what is most likely the most important factor for this designation? a. china’s government spends money on things that do not benefit human development. b. china has a large population, so its gdp per person is only modest. c. china has a strong economy but weak literacy and school attendance rates. d. china’s high rates of disease offset the country's economic gains.

Where did the solar system come from?