What if we all started out as one celled microbes?

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"we"?

We were born humans. Life began as single cells, much simpler than those of today.

Evolution = mutation + natural selection.


Here, these sites should provide great starting points:

http://evolution.berkeley.edu/
http://www.pbs.org/wgbh/evolution/educators/index.html
http://www.talkorigins.org/

With ~Hope~ Of Sanity....Show more

Probably, a few cells started to live together in a colony, sharing food and gaining more resilience from physical obstacles. Microbes live like that now in colonies. They CAN live alone, but they do better in groups. Later, various cells take on specialized roles, depending on their location in the colony. That is called multicellularity, the classic early multi-celled organisms is the worm. We see the remnants of this evolution throughout the living world: Organisms that succesfully made it as partially complex colonial and multi-cellular organisms, and stopped evolving. Other individual cells of course became more and more complex, leading to the animal and plant and fungi kingdoms. Also, some cells, protozoa, developed more complexity, just within a single cell, growing "feet", "eyes", etc....Show more

I would answer this but amazingly, the amount of time I would have to use to construct a comprehensive answers is the exact same time you could use to get some real knowledge about evolution....Show more

As soon as the population was sufficiently large it could have mutated in different ways, eventually creating distinct populations....Show more

change in environment.

It is an part of evolution that we don't all have the same DNA so we can tell each other apart.

I don't know I'm not a biologist...Show more