@Demosthenes Well, seed/earth is analogous to embryo/womb. Though I wouldn’t expect it to all make neat analogies. I mean, what to make of spores? :P
It’s interesting because this is the major topic on the podcast Radiolab right now. Anyone else listen? They were talking all about how there are specialized cells in the embryo that form the gonads (ovaries or testes), that these cells resist becoming cells of other organs so that they fulfill their “destiny” of becoming reproductive organs. It’s not surprising that even in the embryonic stage, the body is already placing emphasis on reproduction.