Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

? asked in Science & MathematicsBiology · 2 months ago

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

Update:

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

Thanks in advance!

11 Answers

Relevance
  • ?
    Lv 7
    2 months ago
    Favorite 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

  • 2 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. 

  • 2 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.

  • How do you think about the answers? You can sign in to vote the answer.
  • 2 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-M
    Lv 7
    2 months ago

    Reproduction and Survival.

  • ?
    Lv 4
    2 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. 

  • Cogito
    Lv 7
    2 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.

  • Anonymous
    2 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.

Still have questions? Get your answers by asking now.