Pines reproduce by seed, a multigenerational unit, which in the case of conifers contains both an embryo and the female gametophyte that produced the egg that was fertilized to form the zygote that gr...Pines reproduce by seed, a multigenerational unit, which in the case of conifers contains both an embryo and the female gametophyte that produced the egg that was fertilized to form the zygote that grew into the embryo.