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Author | Topic: Primordial Soup Cannot Tolerate Salt | |||||||||||||||||||||||
blitz77 Inactive Member |
A recent article in the journal )Astrobiology Vol 2. No. 2 (2002) shows that sea salt destroys fatty-acid membranes and prevents RNA from polymerizing, even at 1/7th the concentration of salt of today's oceans. They effectively dismember membranes and stop RNA units from forming anything longer than dimers. With mechanisms proposed to concentrate these for abiogenesis, it also appears that these mechanisms would also concentrate salt.
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nos482 Inactive Member |
quote: Not all bodies of water would contain all that much salt, or life just gradually adapted as salt content increased, just like when the atmosThe requested document is freely available only to registered users with an online subscription to Astrobiology You can purchase this article below Click here for the publisher's subscription information CatchWord has not recognised you as a registered user. If you have registered to access a personal subscription to this title please enter your username and password[/i] [This message has been edited by nos482, 09-23-2002]
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blitz77 Inactive Member |
The point is is that the "primordial soup" theory relies on a mechanism to concentrate amino acids and other organic molecules. This would also concentrate salt, which would stop macromolecules forming. Also, many studies show that the early ocean was twice as salty as it is now-read this abstract of a book-Life on Land in the Precambrian and the Marine Vs Non-Marine Setting of Early Evolution
And as for your point about anoxic vs oxic, I thought most people agree here that it was oxic- refer to exobiology@dukeuniversity
quote: [This message has been edited by blitz77, 09-23-2002]
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nos482 Inactive Member |
quote: How does life exist in the oceans of today if it is so toxic to it? Also, it has been shown that life may have had to "start over" several times in the past as well because of early mass extinctions. [This message has been edited by nos482, 09-23-2002]
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blitz77 Inactive Member |
Because todays organisms are protected by cell membranes, skin, scales, etc.
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nos482 Inactive Member |
quote: And they got that way from trail and error and a lucky mutation or two.
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blitz77 Inactive Member |
This relates to abiogenesis, not evolution.
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Joe Meert Member (Idle past 5680 days) Posts: 913 From: Gainesville Joined: |
Blitz,
You have any number of problems with your idea. Number 1: You assume that the only place for life to have originated is in oceanic tide pools. This need not be the case as it also could have arisen in fresh water systems. Number 2: You assume that concentration of organic molecules in tide pools is the sole candidate for how life arose and this is clearly wrong. Number 3: It is possible that life arose elsewhere in the solar system and was transported here. Finally, no matter the debate about how life started be it by a hairy fondler or a cosmic muffin, it did start and has since evolved. Cheers Joe Meert
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nos482 Inactive Member |
quote: There are many theories on abiogenesis as well where some could have occured along side each other instead of just one. In other words life could have started on this planet through several different methods until one, or more, "caught on". How life started is still mostly an unknown, though. [This message has been edited by nos482, 09-23-2002]
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acmhttu001_2006 Inactive Member |
First off, if I want to verify something, I do not want to read abstracts of a book. I would rather read the book. Abstracts are not written by the book's authors, and merely reflects what someone else thinks the author is saying.
------------------Anne C. McGuire Cell and Molecular, Mathematics, Piano and Vocal Performance Majors Chemistry and Physics minors Thanks and have a nice day
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acmhttu001_2006 Inactive Member |
Yes and how do you think they got this protection?
I do not believe that the organisms of today could live in eons ago, nor vice versa. I believe the organism evolved to fit their surroundings. Even though this is not the scope of the thread. There is no way we will ever find out how life started, why becuase we can't. Do not know why. I guess this is where the Magesterium of Religion and Beliefs come in. As for me, I do not need to know all the answers. ------------------Anne C. McGuire Cell and Molecular, Mathematics, Piano and Vocal Performance Majors Chemistry and Physics minors Thanks and have a nice day [This message has been edited by acmhttu001_2006, 09-23-2002]
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Andya Primanda Inactive Member |
quote: I once heard that the reason scientists try to create the clone sheep Dolly is to confirm their theories. Abiogenesis theories can also be tested; all you have to do is translate them into a working model and see if it runs. Personally I am most curious about how replication emerge from non-replicating matter. Even Dawkins do not dare speculate on this. btw, Anne, you're a self-proclaimed atheist (capital letters) yet you appeal to the Magisterium of Religion. SOunds paradoxical... Maybe Gould also did this?
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peter borger Member (Idle past 7665 days) Posts: 965 From: australia Joined: |
Dear anne,
You confirm what I deduced, that evolutionism is a religion based on believe: QUOTE:"I do not believe that the organisms of today could live in eons ago, nor vice versa. I BELIEVE the organism evolved to fit their surroundings." Best wishes,Peter
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acmhttu001_2006 Inactive Member |
Oh really, but I do mention if I am answering within a certain Magesterium.
Sure it sounds paradoxical. I do not believe in a God nor that such a entity exists. As for morals I define them. But, I can understand a little where the religionists are coming from, as I have grown up in such a household. I am not appealing to the Magesterium of Religion in the last post you were replying to. I think the original post was in response to gene40, wanted to know what her answer would be outside a scientific answer, and if she could back it up. Guess not, I do not know what her answer is. Sorry if it looked like I was going to the other camp. Excuse me. ------------------Anne C. McGuire Cell and Molecular, Mathematics, Piano and Vocal Performance Majors Chemistry and Physics minors Thanks and have a nice day
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acmhttu001_2006 Inactive Member |
Now, why would I have said that they evolve to fit their surroundings? Not based off of my beliefs alone, but becuase of the evidence.
Do you believe in gravity or in thermodynamics? You are a fool to answer no, yet if you answer yes, surely these are not religious beliefs. Though I will not argue, for some it is possible to make anything of their own choosing into their own personal religion. Evolution is not my choice of religion. I have none. Besides, since when did belief make something into a religion. Surely, you are not so narrow-minded as to say that works all the way across the boards? And this is what PISSES me off, are people like you who misquote everything I say to make it justify their points. I have never done that to any of the creationist nor the others whom I may not agree with. I have that respect for them, and expect the same in return. So, before you begin to misquote anyone, ask for clarification, and then confront if their clarification does coincide with what you thought. Otherwise, keep you gosh-danged math shut and not assume. HAve a nice day. ------------------Anne C. McGuire Cell and Molecular, Mathematics, Piano and Vocal Performance Majors Chemistry and Physics minors Thanks and have a nice day
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