How did evolution work?

Recently I Played E.V.O , a landscape game about evolution, and it doesn't make sense at all.

In that game, a fish move to land and it become an amphibian. It doesn't make sense as the fish immediately get legs when he move to the land.

Also, a dinosaur fall from a cliff and immediately he get wings, he evolve to a flying dino.

How did actually evolution work?

3 Answers

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  • 6 years ago
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    If a dinosaur falls from a cliff, it becomes a grease spot. If a fish moves onto land it is still a fish. There are plenty of fish that will migrate short distances on land from one body of water to another without any legs.

    According to the fossil record, legs originally evolved in fish so that they can walk slowly on the bottom, not because they were walking on land. Only later did some of these fish used their legs to walk on land and evolved into amphibians. As the Wikipedia points out,

    "There are some species of fish that can "walk" along the sea floor but not on land; one such animal is the flying gurnard (it does not actually fly, and should not be confused with flying fish). The batfishes of the Ogcocephalidae family (not to be confused with Batfish of Ephippidae) are also capable of walking along the sea floor. Bathypterois grallator, also known as a "tripodfish", stands on its three fins on the bottom of the ocean and hunts for food.[8] The African lungfish (P. annectens) can use its fins to "walk" along the bottom of its tank in a manner similar to the way amphibians and land vertebrates use their limbs on land."

    http://en.wikipedia.org/wiki/Walking_fish

    Therefore the game you are playing does not represent what actually happened in evolutionary history, just a misconception of what might have happened. As for dinosaurs evolving into a bird, it is still a popular misconception, but well informed scientists are beginning to abandon that theory. It will take a while for the general public to catch up. People who have been going around telling others that a dinosaur evolved into birds are fighting tooth, claw and nail to protect their reputations, so they may have to croak before their theory loses popularity. According to scientists who do not have a stake on whether birds evolved from a dinosaur or not, i.e. the biophysicists, evolution of flight from the ground up is biophysically implausible. Instead we should look for bird ancestors that were small, arboreal and were gliding, not among the large, ground dwelling dinosaurs. If these dinosaurs were to climb a tree or launch themselves down a cliff, they would create a grease spot on the ground.

    The evolution of flight most likely occurred in a small arboreal reptile that glided. Once an animal has evolved the ability to glide, it is a tiny additional step to evolve flight, because while the glider is experimenting with active flight, it can still glide to safety if the experiment fails. If a large animal like a dinosaur tries to fly and fails, the result is broken bones, bone ribs, and perhaps broken limbs. The available evidence suggests that birds evolved from the feathered reptile known as Longisquama insignis. But since Longisquama is not a dinosaur, those people who believe that birds can only evolve from a dinosaur will deny that it is even possible that Longisquama had feathers or that it could glide. Of course they would never even consider the possibility that Longisquama could have evolved into the ancestor of living birds. Their main concern is not the truth, but how much career damage they would suffer by admitting that they were wrong about a dinosaur having evolved into birds.

  • 6 years ago

    It's a gradual process. When playing a computer simulated game it's very difficult to hold people's attention spans through thousands upon thousands of generations of creatures to display proper evolution so they do that dramatic version

    In reality, with every generation the weakest ones with the least effective traits would die out, having (hypothetically) mated the least in their lifetime due to the low effectiveness of their traits. So the offspring from the animals that were more suitably adapted are more populus than those from the lesser effective traited beast, and through this process the better traits emerge dominant. When an animal has a mutation that makes it much more successful at mating and keeping its young alive then those genes are passed on, and if another animal has the same mutation and is also successful then those offspring will also carry the genes for the mutation. Over time the entire population could have that useful mutation, and that mutation may mutate and then you'd get wings, or flippers, or a platypus, etc.

    -Hope I could help!

  • scowie
    Lv 6
    6 years ago

    That game obviously takes some shortcuts. For a fish to have evolved into a land animal it would have to start spending some of it's time clambering around the shores so that growing legs would give it an advantage. Once later generations have legs they would then spend more and more of their time on land and adapt so that they are no long so well suited to life in the sea. One interesting creature alive today that appears to be a sort of transitional creature is the mudskipper: https://en.wikipedia.org/wiki/Mudskipper

    As for how flight evolved, the tree-down approach makes the most sense, i.e. a tree-climbing lizard starts jumping down from trees to escape danger, with later generations gaining the ability to glide, and later still, to fly.

    I guess this game represents many generations with just one animal.

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