How Did the First Sexually Reproducing Organisms Arrive?

RickOne big problem with the article is that it assumes that some thing happens in one species and then have to happen in another species and then again, and again, and again.But Evolution doesn't work like that. At some point sexual reproduction happens. One time or possibly multiple times but seperated by time and distance.Likely, it happens in several steps, first with creatures that are both male and female. Later, that group evolve into creatures that are male, OR female.From that beginning (or beginnings), other creatures evolve. The new species do not reinvent sexual reproduction but rather evolve from creatures that already reproduce sexually.

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Aslan is not a Tame Lion

is to remember that there are not all that many key Evolutionary steps needed.There are the steps involving asexual ----> sexual critters. The sexual critters seem then to break down into two categories, those that are male or female, and a very large body that is hermaphoditic. IIRC, there are over 100 species of hermaphrodite fish as one example.The descendants of those early critters, both plant and animal, are what we see today.One interesting thing for me is that in the sexual community, there seems to be only two breeding methods that are common to all of the organisims, both plant and animal. There are those that breed as individuals, that mate as individuals, and there are the broadcasters, those that simply release sperm and eggs (or polen) and let them mix.Since these two methods seem to be common to both plant (although the mating plants do use an intermediary) and animal, they are likely traits that predate either.

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Aslan is not a Tame Lion