evolution Question?

Question

I'm not an evolutionist but do not insult the idea. but I was wondering with all these weird things being born like the six legged goat or the funky pig that had 3 eyes and other stuff like this do you believe maybe we are going though an evolutioary change in some spiecies. possibly because of the threat of global warming or maybe just nature moving forward or could it just be genitic flukes. all seam to have a good point behind them what do you think(non evolutionist please stay out of this one its for the idea of science thinking only)

obviosly i'm not qualigied o give best answer so I'll let people vote

Answer 1

Mutation is an integral part of evolution. Trial and error. And the 2headed calves are errors. But once in a while a mutation will crop up that will actually help an organism in its environment. Like webbed feet for an aquatic mammal. Those mutations get passed down to offspring. It's really pretty complicated, but you should be able to find the same thing in any anthropology textbook.

Answer 2

1. The earth's temperature has fluctuated in temperature since earth came into existence. The temperatures we are experiencing on earth now and even in the next 50 years are not the warmest temperatures experienced on earth by any record or any scientists estimate.

2. Temperature as an environmental factor does not cause mutation. Radiation and Chemicals cause mutations and natural mutations occur around 1 in the millions as a result of imperfections in the DNA replication for animals.

3. Natural selection causes evolution and if temperatures rise significantly then evolution would naturallly select for those animals that are smaller, less overall body mass and heat/homestasis to maintain and animals that are less furry with less hair and overall body fat

4. Bacteria and Viruses mutate quite often and can select for resistant strains as a result, This is the greatest threat greater than 1 and 2 or 3

Answer 3

First of all "evolutionist" is only a rhetorical term that critics of evolutionary theory use.

As far as six legged goats, or pigs with three eyes, such things are caused by genetic switches of HOX (homebox tool-kit) genes malfunctioning during embryogenesis, when cell alignment and organization is taking place. Strictly speaking, such accidental repetition of morphological structures is not typically how evolution takes place on a molecular level. One way that evolution often takes place, however, is when a nucleotide transcription error in the genetic switch of a HOX gene creates a phentotypic variation that does increase the adaptive fitness of an organism.

Answer 4

That's Hox gene mutations. Hox genes, particularly the Toolkit gene, control our basic developmental patterning. If early embryos are exposed to mutagens or external environmental factors, these can occasionally throw off the wiring in Hox genes and cause them to send incorrect messages, resulting in bad patterning.

Through experimental manipulation (mainly on Drosophila), scientists have been able to trace these developmental pathways and see what happens when there are mutations in individual genes. This technique is also being applied to a lot of other animals, including vertebrates.

Of course, Hox genes can also randomly mutate, but a lot of the weird things are probably the result of environmental toxins messing up developmental pathways.

Answer 5

I think those you counted are a result of mutations that take place in the early phase of the development of the fetus, or before that in the spermatazoa or ovum. These occur every now and then, usually disappears out of sight because those anomalies do not favor the survival of the species. I personally do not think that it has anything to do with global warming but something to do with toxics, radiation that directly affect the genes.

Answer 6

Every single species on the planet is always evolving. As long as each generation is different from their previous, they are evolving. For example, you are not exactly like your parents. And you kids won't be exactly like you. You skip forward 10,000 years and your descendants will look much different then you.

Answer 7

These are just birth defects. For evolution to be taking place there would have to be a whole new species of animal growing with these traits.
Global warming is just starting to take affect.

Answer 8

for these physical changes to be involved in evolution, you would need to see a large number of the new animals, and they need to be able to interbreed, so i doubt evolution is the answer.

global warming cant affect animals in that kind of way

its going to be a freak event, or some idiot scientist whose exposing early embryos to dangerous chemicals at an early stage of develpment

Answer 9

mutations happen all the time. some times its a good mutation but most of the time their failures.. so don't let global warming worry you, that sort of stuff happens all the time

Answer 10

I think humans are evolving to be fatter, lazier, and stoopider.