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1

Can sexual selection operate in temperature dependent sex determining organisms? Yes! Crocodiles are indeed a good example as the sex in determined by the temperature (ref) and they have some traits evolving through sexual selection (ref). I think you went almost all the way to the answer in your thoughts. Let's categorize things a little bit and talk ...


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Smallest free-living bacterial genome: Nanoarchaeum eqitans at 491Kb (Waters et al., 2003) I downloaded this paper it says that this is archaea and its obligate symbiont not a free living bacteria. Please read carefully and then upload it.


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Regarding the reference to Lynch, actually reading this paper is illuminating (http://www.pnas.org/content/107/3/961.full). What Lynch is saying with regards to degeneration is that he and others feel that modern technological advances may relax selection pressures, thus allowing the survival and reproduction of many who would otherwise be selected against, ...


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A small addition to what March Ho has mentioned in their answer. Fitness is not absolute; it is dependent on the present environment. Fitness has no meaning when the selection factor is not defined. You can consider a commonplace example: Can you, by just looking at an individual say how fit they are (of course I am not talking about those who are ...


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If I understand the question correctly, you are asking why random mutations (most of the non-silent ones are deleterious) cannot create information and improve the overall fitness of the organism. This is a common creationist statement, and has been shown to be incorrect in many different ways. The best way this can be shown to be false is by simply ...



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