News flash: two sexes evolved in sexually reproducing lineages; they specialize in making either eggs or sperm.http://www.washingtonexaminer.com/the-anti-science-crusade-to-deny-differences-between-men-and-women/article/2621159 …
No, they're observed regularities. There are 2 kinds of gametes, because isogamy is an unstable equilibrium. https://en.wikipedia.org/wiki/Gamete
9:39 AM - 25 Apr 2017
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