Which best summarizes the concept of natural selection? a. an organism will always adapt to its environment b. a mutation always makes a species fitter c. the fittest organisms survive and reproduce d. an organism will always mutate to survive

Graded assignment lab report answer the questions below. which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.