Why might both cell types be considered equally successful

There is a greater diversity of processes within the cell because they have a nucleus and organelles. ... Both cell types can be considered equally successful because they are both surviving in today's ever-changing environment. Archaea can survive in extreme environments and bacteria can grow almost anywhere.

Even though there are many different types of cells, they all share similar characteristics. All cells have a cell membrane, organelles organelles, cytoplasm, and DNA.

b is the correct answer

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