What are the two most important steps in the evolution of life and why?

Question

Update:

I want to understand it in depth and therefore appreciate a detailed answer.

Thanks in advance!

Answer 1

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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).

Answer 2

We're not a textbook.  Look it up.  There are five parts needed and no steps.  Energy, water, oxygen, nutrients and  right temperature

Answer 3

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. 

Answer 4

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.

Answer 5

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.

Answer 6

Reproduction and Survival.

Answer 7

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. 

Answer 8

Evolution doesn't consist of steps at all.  It's a very slow, gradual process which has taken place over billions of years.

Answer 9

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 .

Answer 10

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.