Voluntary muscles can be controlled, while involuntary muscles cannot. do you think stomach muscle is voluntary or involuntary?

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

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