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Author Topic:   Origin of viruses
Kiddo
Junior Member (Idle past 1578 days)
Posts: 4
From: India
Joined: 08-10-2012


Message 16 of 24 (670866)
08-20-2012 12:15 PM


Is it also possible that viruses evolved from a more developed organism like bacteria/fungi...i.e., an advanced form of spores/similar forms which are meant just for the survival of the organism and nothing else.(I am unable to put it in proper words but i hope u understand.)I am saying this because as I understand viruses, they only exist to survive and increase their population.
Replies to this message:
 Message 19 by Drosophilla, posted 08-21-2012 5:37 PM Kiddo has responded

    
Kiddo
Junior Member (Idle past 1578 days)
Posts: 4
From: India
Joined: 08-10-2012


Message 17 of 24 (670869)
08-20-2012 12:27 PM
Reply to: Message 2 by Admin
08-18-2012 4:39 PM


I actually meant it as a question. I will be careful from the next time.
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Dr Adequate
Member
Posts: 15468
Joined: 07-20-2006
Member Rating: 3.8


(1)
Message 18 of 24 (670871)
08-20-2012 12:39 PM
Reply to: Message 6 by foreveryoung
08-18-2012 11:20 PM


How is it magic if the personality that brought the laws of physics into existence and is the source of all energy is able to manipulate those laws and energies to his own ends?

Well, I take it that "magic" means the ability to over-ride the laws of nature by an act of will. Religious people for some reason prefer to use the word "miracle" when God does it, but this is a distinction without a difference.


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Drosophilla
Member (Idle past 988 days)
Posts: 172
From: Doncaster, yorkshire, UK
Joined: 08-25-2009


Message 19 of 24 (671029)
08-21-2012 5:37 PM
Reply to: Message 16 by Kiddo
08-20-2012 12:15 PM


Origin of viruses
Hi Kiddo,

I am saying this because as I understand viruses, they only exist to survive and increase their population.

And how is this different to the reason for existence of any life form? Plants, fungi, bacteria, animals - they all exist to survive and propagate their species.


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 Message 16 by Kiddo, posted 08-20-2012 12:15 PM Kiddo has responded

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 Message 20 by Kiddo, posted 08-22-2012 9:20 PM Drosophilla has responded

  
Kiddo
Junior Member (Idle past 1578 days)
Posts: 4
From: India
Joined: 08-10-2012


Message 20 of 24 (671190)
08-22-2012 9:20 PM
Reply to: Message 19 by Drosophilla
08-21-2012 5:37 PM


all other organisms tend to increase their functionality/complexity , like secreting enzymes, developing protective coats around them, etc. But in case of viruses, they became more simpler and lost their functions rather than gaining new ones.
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 Message 19 by Drosophilla, posted 08-21-2012 5:37 PM Drosophilla has responded

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 Message 21 by Drosophilla, posted 08-23-2012 7:39 AM Kiddo has not yet responded
 Message 22 by Dr Jack, posted 08-23-2012 11:15 AM Kiddo has not yet responded
 Message 23 by New Cat's Eye, posted 08-23-2012 11:48 AM Kiddo has not yet responded

    
Drosophilla
Member (Idle past 988 days)
Posts: 172
From: Doncaster, yorkshire, UK
Joined: 08-25-2009


Message 21 of 24 (671208)
08-23-2012 7:39 AM
Reply to: Message 20 by Kiddo
08-22-2012 9:20 PM


all other organisms tend to increase their functionality/complexity , like secreting enzymes, developing protective coats around them, etc. But in case of viruses, they became more simpler and lost their functions rather than gaining new ones.

But regardless of complexity of operation, all lifeforms have the basic function to make more copies of themselves. Unless you can think of another reason why a mushroom pops up out of the ground.


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Replies to this message:
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Dr Jack
Member
Posts: 3500
From: Leicester, England
Joined: 07-14-2003


Message 22 of 24 (671226)
08-23-2012 11:15 AM
Reply to: Message 20 by Kiddo
08-22-2012 9:20 PM


all other organisms tend to increase their functionality/complexity , like secreting enzymes, developing protective coats around them, etc. But in case of viruses, they became more simpler and lost their functions rather than gaining new ones.

Viruses are developing new functions all the time. They're extremely refined replicators with some of the most remarkable adaptations.


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New Cat's Eye
Member
Posts: 11171
From: near St. Louis
Joined: 01-27-2005
Member Rating: 1.7


Message 23 of 24 (671230)
08-23-2012 11:48 AM
Reply to: Message 20 by Kiddo
08-22-2012 9:20 PM


all other organisms tend to increase their functionality/complexity , like secreting enzymes, developing protective coats around them, etc. But in case of viruses, they became more simpler and lost their functions rather than gaining new ones.

Well, it really all depends on the environment. There does seem to be a tendancy towards complexity, but this is due to available niches in the environment allowing for it. If the environment exhibits pressure towards simplicity, then that will happen too. For example, fish in caves that lost their eyes:

Presumably, the same goes for viruses.


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caffeine
Member
Posts: 1213
From: Prague, Czech Republic
Joined: 10-22-2008
Member Rating: 3.4


Message 24 of 24 (671283)
08-24-2012 4:17 AM
Reply to: Message 21 by Drosophilla
08-23-2012 7:39 AM


But regardless of complexity of operation, all lifeforms have the basic function to make more copies of themselves. Unless you can think of another reason why a mushroom pops up out of the ground.

I think the suggestion is that viruses could be descended from cellular life, which found a parasitic niche that allowed them to do away with the cellular mechanisms that they could steal from their hosts.

The famous experiment by Sol Spiegelman, in which he supplied a simple virus with everything it needed to replicate itself for free, and then watched it's genome shrink to a tiny fraction of its previous size, could be an elaboration of the original process by which the first viruses evolved from prokaryotic ancestors.

This is all just guessing, though.


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 Message 21 by Drosophilla, posted 08-23-2012 7:39 AM Drosophilla has not yet responded

  
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