There are many unicellular organisms. In addition , Anything less than a cell is not alive. What do these two statements imply about cells?

i thinking chemical change

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

layer 3 is younger than layer 6.