Is Darwin's Theory of Evolution True? Part 4.1

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If you think Darwin proposed a single species only ever gives rise to a single species–namely, the one that replaces it–I get the idea you are totally unfamiliar with Darwin’s work.
 
Oh I think we’re seeing evolutionary history right now. Species are dying out at a terrific rate.

That, by the way, is not a theory. Those are observations.
 
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PetraG said:
If you think Darwin proposed a single species only ever gives rise to a single species–namely, the one that replaces it–I get the idea you are totally unfamiliar with Darwin’s work.
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It doesn’t work like this ?
 
Note the Grade Level in that. Also remember that while we are in school we’re supposed to come away with more substance than just the pictures, LOL.
 
Techno2000 said:
How is it that a ancestral transitional form (dinosaur) is living with its own future bird form ?Isn’t the ancestral transitional form suppose to die out because it couldn’t adapt ?
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This has cropped up a couple of time now - do you really want to know? Over 700 species of dinosaur have been identified. Some them had evolved feathers by the time of their extinction about 65 million years ago. Whatever the cause of their extinction, it seems that small, warm-blooded ones survived, suggesting that the extinction event was particularly difficult for large, cold-blooded ones.
 
PetraG said:
Oh I think we’re seeing evolutionary history right now. Species are dying out at a terrific rate.

That, by the way, is not a theory. Those are observations.
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Only because of man’s encroachment on their environment.
 
Look, my friend, Rossum has given very good explanations here. You have to make an effort, I’m stating to think you have an agenda here, not simple curiosity.

How much longer do we have to wait? Are you serious? So what do you think the world has been standing still? How on earth do you believe you are writing these words and you’re not a eukaryotic cell in the ocean? Natural selection! Evolution!!
 
Non-avian dinosaurs became extinct. Winged dinosaurs survived an de became birds. I don’t know exactly why they survived, maybe the fact that they were smaller and needed less food
To live played a role
 
Techno2000 said:
What was the environmental catalyst that triggered this DNA mutation .
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There are several possible explanations which fit the evidence as we know it. No doubt we will be able to refine them as we discover more fossils. The theory of evolution, as you know, is an explanation for observations.
  1. Tectonic drift away from the equator made some populations of dinosaurs colder than they were before, favouring feathers as insulation.
  2. Local climate change resulted in some populations being colder than they were before, favouring feathers as insulation.
  3. Overpopulation increased competition for mates, and feathers evolved as secondary sexual displays.
  4. An increase in predators stimulated threat displays.
  5. An increase in predators stimulated camouflage.
  6. A decrease in prey stimulated camuflage.
 
Darwin guessed at evolution from the great variety of similar but distinct species he observed. A physical or behavioral difference can give an advantage to a particular survival strategy rather than changing competitiveness across all situations. Similar species each find their own “niche,” like businesses do now. If the environment is varied enough, this could theoretically give rise to many species from one. When the environment changes, some strategies continue to work while others don’t sustain perpetuation of the family line.

DNA mutations happen all of the time, continually. Hemophilia, for instance, does not show up in royal families back through recorded time. Advantageous ones come along at the right time to be advantageous far less often.
 
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Hugh_Farey said:
Tectonic drift away from the equator made some populations of dinosaurs colder than they were before, favouring feathers as insulation.
Local climate change resulted in some populations being colder than they were before, favouring feathers as insulation.
Overpopulation increased competition for mates, and feathers evolved as secondary sexual displays.
An increase in predators stimulated threat displays.
An increase in predators stimulated camouflage.
A decrease in prey stimulated camuflage.
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But, it took millions of years for all this to evolve what did they do in the meantime ?
 
Dude you’re trolling me, right?

How do you explain the genetic and fossil evidence? How do you explain that humans share about 97% DNA with chimpanzees?

Promise you’re not trolling, or I won’t bother to answer anymore. I feel like you’re deliberately making a blind eye to everything people have reasonably written here
 
Die out or survive thanks to completely random genetic mutations. It’s called a transition. A rat doesnt become a whale in one afternoon. It takes a lot of time
 
Sometimes it is lack of environmental pressure and abundance of niches.

Think of all the breeds of dogs there are. Put them in the wild, and all that structural diversity would all be gone in a few decades, maybe even a few years. There is very little actual genetic difference behind all that diversity
 
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