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This is not an area I know well, but I'm familiar with a couple of studies that have tried to estimate the heritable (genetic) component of homosexuality in humans. A review paper by Rice et al (2012) points out that: Pedigree and twin studies indicate that homosexuality has substantial heritability in both sexes, yet concordance between identical twins ...


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As the body mass of an organism decreases, their volume decreases exponentially, so their metabolic needs are also reduced. The result is that small organisms like worms and insects have a much larger surface area to body mass ratio, which lets them passively transfer oxygen into their bodies much more easily. I am by no means an entomologist but most ...



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