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Sep
18
comment Why do DNA and RNA have the functions they have?
I suggest going to the original refernces instead of wikipedia. Look up Gilbert (1986) in Nature for the RNA world.
Sep
18
comment Ramifications and possibility of a diet consuming exclusively of human semen
I downvoted because the question as phrased is not suitable for this site. Asking "what is the nutritional content of human semen" would be more appropriate for a biology forum. In what possible context would you be confronted with a situation where you had to survive on male ejaculate?
Sep
18
revised How does the NAD+/NADH ratio affect lifespan in vertebrates?
added a bit more text to directly address question
Sep
18
answered How does the NAD+/NADH ratio affect lifespan in vertebrates?
Sep
17
revised How do biological communities at deep-ocean hydrothermal vents migrate between vents?
deleted 1 characters in body
Sep
12
comment What kind of fruit is this?
Yes it is Arbutus Unedo. We have several in the garden. In Spain it is called a Madroño. The fruits are edible, but they don't taste that great. They are not very sweet and can have a mushy texture. Use them to make jams.
Sep
8
asked Is there any documented evidence for suicide among vertebrates other than humans?
Aug
21
answered What would need to be discovered to prove there is extraterrestrial life?
Aug
20
awarded  Nice Answer
Aug
12
awarded  Nice Answer
Jul
21
comment Do trees age on a microscopic level?
Thanks @Luke. Looks like a good read.
Jul
21
comment Do trees age on a microscopic level?
@Luke do you have a ref. for the second review you mention? The Cell website is down.
Jul
21
comment Do trees age on a microscopic level?
Very interesting answer Luke!
Jul
20
comment How did the nucleobases in the Murchison meteorite form?
But certainly the importance of dust should not be underestimated!
Jul
20
comment How did the nucleobases in the Murchison meteorite form?
I am not sure that I would say that we are left to speculation. The fact that these chemicals are racemic would suggest that they were formed abiotically. This being the case, we can probably get to understand the chemistry which should be pretty basic.
Jul
20
comment How did the nucleobases in the Murchison meteorite form?
@KonradRudolph The argument about reducing vs non reducing atmosphere goes on, but it probably was not as reducing as Urey Miller assumed. Not to take away from their very important contribution however. Regarding black smokers, yes they are favourite candidates for early life, but their chemical environments are not much like Urey Miller either!
Jul
20
comment Does stress physically age our body?
I didn't say there was a contradiction, but as you have just said it a clearly more complicated than saying stress=bad.
Jul
20
comment How did the nucleobases in the Murchison meteorite form?
See my response below. The problem with Urey-Miller is that they assumed a strongly reducing environment which probably was not the case on the early Earth thereby giving them very high yields of lovely organic stickies.
Jul
20
comment Does stress physically age our body?
Not sure that I am entirely convinced by this. Some studies have shown (looking for refs...) that stress can be an important stimulant of the immune system - i.e. hormesis.
Jul
20
revised How did the nucleobases in the Murchison meteorite form?
added 69 characters in body