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Now we enter the world of nonhuman animals, which have variations so troublesome that
they will have to melt away with jealousy at the streamlined, well-made human human body -- knowledge teeth
and all. And that lack of adaptation suggests a lot of us have stories of swollen,
bruised jaws and stomach-churning cases of dry socket following
our "successful" wisdom tooth removing. So these vestigial organs are not so substantially an example of diversifications gone improper, but a absence
of adaptation. So considerably we've experienced some quite staid adaptations (or deficiency
thereof) that are either a bit inconvenient, possibly unnecessary or
just in the way. Number 1, slugs are all hermaphrodites.
We start off with our sticky friends, the banana slugs. When banana
slugs mate, they both of those insert their penises into
each and every other. Although our banana slug compatriots get
to change sexual intercourse on a whim, most women in the animal
species are really a lot left to gestate and start their offspring.
But at the close of the deed, occasionally a slug -- or each slugs, at the same time
-- will chew every other's penis off.