All of the following would be questions that could be scientifically investigated except: question 8 options: what is the best advice a parent can give a child? will equal sizes of wood and aluminum have the same mass? does lack of sunlight affect plant growth? do orange popsicles melt faster than grape popsicles?

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.

An easy way to calculate the amount of energy available at each level is to what?

What are some characteristics of a free enterprise economy?