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What are the two most important steps in the evolution of life and why?
I want to understand it in depth and therefore appreciate a detailed answer.
Thanks in advance!
- ?Lv 72 months agoFavourite answer
The two most important 'steps' are :
1) Reproduction (the simple case of Male + Female = Babies. A species has to reproduce to evolve .. individual animals do not evolve .. the species as a whole does).
2) Adaptation over time (changes within the species as a whole depending on the environment that it lives in. So, for example, take the giraffe .. giraffes with longer necks survived better than giraffes with shorter necks .. and so the 'long neck' gene became stronger .. and so ALL giraffes have long necks now).
- 2 months ago
We're not a textbook. Look it up. There are five parts needed and no steps. Energy, water, oxygen, nutrients and right temperature
- Robin WLv 72 months ago
Well, there has to be variation, which happens when genes mutate. There has to be selective pressure, which will cause the individuals that don't have the beneficial mutation to die, leaving only the ones that have the mutation to pass the trait on to the next generation. It is change in a population over time. If it does not happen this way, that selective pressure would cause extinction.
- r.wolfpawLv 62 months ago
You want a detailed answer of evolution yet you ask it in the religion section?
That's like asking legal advice from your postal deliverer.
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- PyriformLv 72 months ago
It is not clear what you mean by 'steps'. Looking at the question in one way, geezer's answer is a good one, but alternatively you could say that the important steps were random mutation and natural selection.
"I want to understand it in depth"
Then Y!A is definitely not the right place to come, and especially not R&S. You might try asking for a book recommendation in the science section, or you could read the Wikipedia article on the subject.
- Bill-MLv 72 months ago
Reproduction and Survival.
- ?Lv 42 months ago
Humans are not native to Earth
so that means evolution did not
happen here. It could have
happened on our previous home-worlds.
1) Humans first colonized Earth around
900,000 BC, by settling on the
island-nation of Lemuria which
stretched from Australia to Hawaii.
Because of it's location, it remained
undisturbed and reached great
heights known as "Golden-Ages"
each lasting thousands of years.
2) One faction, decided to break off
and founded Atlantis around 250,000 BC.
From there we slowly "devolved" and
forget our true origins.
3) Atlantis triggered a global nuclear
holocaust and 15-point earthquakes
around 11,000 BC or some say 10,500 BC.
This was recorded as the Great Flood.
Because the people of Atlantis were so greedy,
the Creator ordered our DNA to be shut-down.
That means we lost our ability to fly and
remain invincible; live for thousands
of years; speak by telepathy and travel the stars.
Those who had retained the "ancient" ways
were hunted down and attacked, so they
left our planet. All who remained entered a
very deep sleep.
- CogitoLv 72 months ago
Evolution doesn't consist of steps at all. It's a very slow, gradual process which has taken place over billions of years.
- Anonymous2 months ago
When life originate from no where on earth, then from that on , life start on with evolution from nowhere and finally end up from nowhere.That is why .
- 2 months ago
It all depends on who survives long enough to reproduce and pass on their genes. Let's say you have a population where only half are immune to some new deadly disease. When the half that isn't immune dies before they can reproduce, they don't pass on their susceptible genes to the next generation. It can then be said that the population evolved to be resistant to the disease.