This is an illustration of the moss life cycle. although moss is a primitive plant, it does have some things in common with higher plants and animals when it reproduces. take a good look at the diagram. find the term gamete. describe what is happening at this step in the reproductive cycle of moss. a) the sperm fertilizes the egg to produce a zygote. b) gametes unite during meiosis to produce a zygote. c) gametes combine to form a larger cell called a zygote. d) pollination joins the two gametes outside the moss plant body.