Non-flowering, cone-bearing plants produce seeds in the cone. Other plants, like ferns and mosses, are non-flowering and do not produce cones or seeds. How does a fern begin the first stage of the life cycle?

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

looks like the answer is     c     to me!

c is the answer. hope this