"Saccharin has been determined to cause cancer in rats, and rats are sufficiently similar to humans biologically for us to conclude that saccharin will cause cancer in humans, too." In Analogy 1, what is the comparison term?

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.

What is true of sea slugs in these orders

Give an example of a trait that is controlled by more than one gene.