HELP How does structure relate to the function of macromolecules? Include at least one example of how structure relates to the function of macromolecules in your answer.

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?