List 3 heavenly bodies that were discovered using radio waves

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time

Which of the follow describes a disadvantage secondary sources have compared to primary sources?

What are the three different shapes or structures shapes or structure of carbon-based molecules?