BIOL 150 Study Guide - Comprehensive Final Exam Guide - Oxygen, Adenosine Triphosphate, Carbon
Document Summary
Changes organisms to be better at living in their environment. Three of the greatest unifying ideas in bio. Scientific method = systematic observation, measurement & experimentation. Leads to formulation, testing, and modification of the hypothesis. Theory = comprehensive explanation for phenomena, supported by widebody of evidence. Null hypothesis = a null hypothesis is a hypothesis that states nothing will change after the experiment. 4 types of atoms make up 96% of all matter. Every element except hydrogen has more than one neutron in its nucleus. Masses are so small, use a special measurement called the dalton (da) The number of protons in an element does not vary, if the atomic number changes, so does the element. Isotopes are elements that have different numbers of neutrons. Atomic mass is an average of all masses of naturally occurring isotopes based on their abundance. Most isotopes are stable, but some are what are we call radioactive isotopes.
