LIFESCI 1 Chapter Notes - Chapter 24: Polyphyly, Molecular Clock, Selective Breeding
Document Summary
1. 1 the scientific method is a deliberate way of asking and answering questions about the natural world. Observations are used to generate a hypothesis, a tentative explanation that makes predictions that can be tested. page 4. On the basis of a hypothesis, scientists design experiments and make additional observations that test the hypothesis. page 5. A controlled experiment typically involves several groups in which all the conditions are the same and one group where a variable is deliberately introduced in order to determine if that variable has an effect. page 5. If a hypothesis is supported through continued observation and experiments over long periods of time, it is elevated to a theory, a sound and broad explanation of some aspect of the world. page 6. 1. 2 life works according to fundamental principles of chemistry and physics. The living and nonliving worlds follow the same chemical rules and obey the same physical laws. page.
