Explain the concept of “survival of the fittest.”

The best ones get to survive and reproduce. if you can adapt to your environment you will get to have kids and pass on those helpful traits from you to your kids which can help them survive in the same environment.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products