sorry I took so long to reply, but I haven't been here over the weekend.
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by thap:
Nescio,
You have a lot of questions, I’ll try and address them as best I can.
Lets consider the common sheep and bacteria, yes bacteria do survive and thrive in many environments and many forms have survived unchanged for eons. However, even bacteria has gone through evolutionary change. Evolution is not simply mutation for the sake of creating a ‘better’ species. It is a gradual process that occurs at random. This is the key ** random mutation **. Random mutation leading to a single point occurrence of an organism that may or may not survive long enough to pass on it’s genes. Some mutations are not beneficial and the organism in question will be hindered, but not necessarily become extinct. Some mutations are indeed beneficial, for example early amphibians could lay their eggs in shallow water or even on land in pools, thus protecting them from predators in the ocean. These early amphibians unlocked the landmasses of the world for life to begin spreading out of the oceans.
Now back to the sheep, these along with numerous other animals are the product of mutation and evolution, in the wild they are adequately adapted to a life of grazing and reproduction. To say they are more advanced than bacteria is true, they are more intelligent and aware of their surroundings and do not simply live a life of reproduction. Bacteria are very well adapted to what they do, this is one reason many forms have survived relatively unchanged for millennia…they have found an ecological niche and exploit it to it’s fullest. Now what do mean by ‘better’ if you simply mean able to survive and reproduce then yes…bacteria are ‘better’ in this respect. But when talking about intelligence having motive and cognition of events than no they are most definitely less evolved than sheep.
** The evolution theory says that a mutation is considered to make an organism "better" if this mutation allows that particular species to reproduce = pass on its genes more effectively. So the question remains whether the mutation which led to the sheep having motives and intelligence, allows the sheep to pass on its genes more rapidly and effectively. I doubt it. On the contrary, because sheeps and other animals become aware of their environment and cognition they get busy doing other things than only reproducing (I'm talking about humans in particular).
I don't see why for example sending space shuttles into orbit is helping an engineer passing on his genes. Or playing chess, or..... for that matter becoming a religious person.**
On to your second point, proving evolution. This process can be slow taking millennia, or relatively fast taking days. Let me explain, the horse. During the Tertiary period (~65 million years ago to present) fossil evidence has highlighted the evolutionary changes in this animal. During the Eocene (~50 million years ago) the common horse was very different to what we know today, it was about the size of a dog and lived in heavily wooded areas, where it ate berries and evaded predators by hiding in the undergrowth, this species was know as Eohippus. During this time great climatological and environmental changes were taking place, the woodlands across the globe were retreating to open short green vegetation, the first appearance of grasses (Angiosperm). This event created the impetus for many animals to evolve. Eohippus throughout the Tertiary period became larger, no longer beneficial to be small as hiding in undergrowth was not an option. Eohippus fossil assemblages gradually led to Miohippus and a whole host of other intermediate forms until it evolved into the modern day horse. This is the conventional form of evolution we are all used to hearing about. Now there are many ways evolution occurs, another more rapid form can occur after drastic climate change (global storms, meteoric impacts, etc). I will hypothesise an example to highlight.
A huge volcano erupts and encircles the globe with fine dust particles obscuring the rays of the sun, corals in the oceans dependant on a particular level of light cannot photosynthesise and die, whilst some of the same species of corals contain a mixture of algae some forms able to use a more limited supply of sunlight survive. The species has evolved and now only species containing a mixture of algae will reproduce. This example highlights how evolution can occur in one generation….but it usually take a large event to instigate.
**consider the example of the evolution of humans: my question: Did all humans evolve from the same monkey? or were there several monkeys living in different parts of the world which, on different occasions, evolved to become humans, some became indians some mongoloids and some caucasians?
if the first scenario is true: how come when this one monkeys was evolving to become a human (it took millions of years), that somewhere else on this planet another monkey didn't start becoming an human? I think he has an equal chance of developing the same mutation which led to first monkey becoming an human. and since it took millions of years for the first monkey to evolve, the second one had enough time to develop that same mutation.
moving on to the second scenario: if this is the case, then we should see that there are "humans" alive somewhere in this planet which are still in for example the Neanderthaler stage. but that isn't true (at least according to my info)
**
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