Which energy source is renewable? A. Geothermal B. Coal C. Oil D Natural gas

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d

Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human