Why is there such similarity in all Earth life forms?

Discussion in 'General Science & Technology' started by joepistole, Aug 12, 2008.

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  1. Enmos Staff Member

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    Not quite.

    I urge you to read this:
    http://www.cals.ncsu.edu/course/ent425/tutorial/respire.html

    Also, insects evolved long before any mammal did.
    And mammals did not evolve from insects.
     
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  3. Yorda Registered Senior Member

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    there is similarity because you need to have because organisms wouldn't survive if they didn't have important things like "teeth, stomach, intestines, hearts, livers, brains, arteries, veins, blood, skin, eyes, lungs, nostrils, mouth, etc."
     
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  5. Fraggle Rocker Staff Member

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    Your definition of "organism" seems to apply only to the Animal Kingdom. Plants and fungi don't have anything remotely analogous to teeth, stomachs, hearts, livers, brains, eyes, lungs and mouths, and it's a stretch to give them credit for several of the remaining six items on your list. I don't know as much about bacteria but I'm sure they also fall far short of satisfying this list.

    The reason animals have all evolved similar organs is that they all evolved in the same environmental conditions. They have to have organs that take in oxygen and exhaust carbon dioxide and water because hydrogen, oxygen and carbon are three of the most abundant and easily accessible elements on this planet in this temperature and pressure. They have to have mouths and teeth and digestive organs because most of the available food on this planet in this temperature and pressure is solid. They have to have circulatory systems for the same reason: at this temperature and pressure, with the elements available to form living things on this planet, they're going to need a liquid suspension of nutrients to keep their solid body parts alive.

    There's absolutely no reason to predict that we'll find these same paradigms in the living things on a gas giant, or a frozen world, or a molten planet, or out in interstellar space. But we might very well expect to find them on another planet similar to earth. If you have an ambient temperature somewhere between the freezing and boiling points of water and your atmosphere is full of carbon dioxide, you shouldn't be surprised to encounter photosynthesis, or something very similar. And then a billion years later something is going to evolve that can eat the plants, and then something else that can eat the herbivores. Duh.
     
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  7. Enmos Staff Member

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    Something tells me you base this on mammalian lifeforms only.
     
  8. joepistole Deacon Blues Valued Senior Member

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    Exactly right, is there some evolutionary advantage to the way life has evolved on Earth? Is Earth the McDonalds of the universe? If not why can the Star Trek crew travel anywhere in the universe and eat locat foods without getting poisoned?

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  9. Yorda Registered Senior Member

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    of course. plants don't have organs so they're not organisms.

    yes, but i think it's also because intelligent designers made them.
     
  10. Enmos Staff Member

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    Here we go again..

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    - plants have organs
    - plants are organisms
    - educate yourself: http://en.wikipedia.org/wiki/Organ_(anatomy)#Plant_organs

    Go play with your Lego blocks.
     
  11. buckybeam Registered Member

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    go play with your organs.
     
  12. Fraggle Rocker Staff Member

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    How curious that someone so intelligent as to be able to create life is so unimaginative as to do it the same way over and over again! If I had just gotten done inventing amphibians, I can assure you that my next project would not be reptiles.
     
  13. Enmos Staff Member

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    I hope that wasn't directed at me, bucky.

    Behold:
     
  14. Yorda Registered Senior Member

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    what are you talking about? there is great variety in lifeforms.

    the intelligent designers created many life forms at the same time.
     
  15. buckybeam Registered Member

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    nope haha

    no yorda.

    yorda no offense but ya really do need to buck up on some of your biology, jeez thats pretty bad.
     
    Last edited: Aug 20, 2008
  16. buckybeam Registered Member

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    yes but remember the designer also created rules. whose to say that the designer didnt just create evolution and see what happens.
     
  17. Roman Banned Banned

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    One thing we all share are ribosomes. When using genetics to do phylogenies, looking at ribosomes (the things that read RNA to make proteins) tells a lot about relationships. It's because it's such a highly conserved (eg, very mutation resistant) region, since it's superduper important.
     
  18. CheskiChips Banned Banned

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    Since ribosomes are so consistent, is it a tool evolved early? Or was it at one time its self an organism?
     
  19. CheskiChips Banned Banned

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    Since ribosomes are so consistent, is it a tool evolved early? Or was it at one time its self an organism?
     
  20. CheskiChips Banned Banned

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    Since ribosomes are so consistent, is it a tool evolved early? Or was it at one time its self an organism?
     
  21. DwayneD.L.Rabon Registered Senior Member

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    Well Joe the awnser to your question is no, life forms form another solar system or even another planet within our solar system would not look the same as human life forms on earth. The proccess of organ communication may be simular (fluids have to travel ect..) but they would not look the same.

    It is one reason that the alien that are shown in movies and in reports are considered false accounts given thier descriptions. How ever there remains the chance occurance that they appear in some simular manner, of which that chance exists only to a few solar systems for human type oragnization, which limits the possiblity where such alien life could come from, to maybe a chance of the solar system of Alpha Centauri, which is actually are closest neighboring star onw that aliens might travel from so we could see them. it is also a very complexed solar system ( meaning the possiblty of intelligent life is very high.).


    DwayneD.L.Rabon
     
    Last edited: Aug 20, 2008
  22. CheskiChips Banned Banned

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    Since ribosomes are so consistent, is it a tool evolved early? Or was it at one time its self an organism?
     
  23. CheskiChips Banned Banned

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    Since ribosomes are so consistent, is it a tool evolved early? Or was it at one time its self an organism?
     
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