Natural selection is defined as a. the changes that occur in a population that do not affect survival. b. the changes in the characteristics within a population that lead to survival c. the changes that occur in an organism over it's lifespan. d. the process by which humans select the most desirable organisms in population

An uncovered pot of water lies out in the sun. which statements correctly describe what happens at the surface of the liquid water? 1. the vapor pressure remains constant regardless of the water temperature. 2. the vapor pressure is produced by water molecules that have evaporated. 3. the vapor pressure increases as the sun heats the water in the pot. 4. evaporation stops once the vapor pressure reaches a certain point. 5. evaporation and condensation both occur on the liquid’s surface.