So how does Evolution work?

Marine to land probably occured in a time where there were some good nutrients to be had in the near-surface, a few steps from water, like special flora that wouldn't grow underwater, and was very nutritious. Organisms that had a capacity or a tolerance to go on earth, and back into water, and so forth were favored. Among these, those who could do it faster for some reason were favored. Then some shape with 4 moving beginning of extremities was able to steer, etc.

It's all step by step.

Something along those lines, I guess. Could be plenty of explanations, and what really happened is surely a mix of many.

>how does Evolution work
it's a miracle

> fish suddenly grew the right equipment to walk
most retarded thing i've ever heard.

Through evolution by natural selection.

>marine to land came about because there was already stuff on the land

Uhh...

One theory is that there were shallow pools of water that disappeared and reappeared with tides or droughts/rains. Most organism caught in such drying pools would perish but some were able to survive for short periods due to random mutations, passing on their genes to offspring with individuals who could spend even more time on land, and so on.

How does it work? Evolution is driven by natural selection, being that the organism best fit for their particular environment will be continue to pass their genes along. Now the only reason we aren't still unicellular bacteria is because of something called genetic mutations. During protein synthesis not every time the correct amino acid is what it was intentionally supposed to be, due to changes in the Nitrogen bases. 99% of these mutations do NOTHING. However even if it does do something it can be a very minor change, or something actually noticeable. For example, blue eyes. This is a very long process, it takes millions of years for the formation of new species, however there is something called punctuated equillibrium where a new species introduces to a vastly different environment leads to a branch of multiple new species. All this is found in fossil records. DNA sequences can be observed and tested by anyone associated with the science involved. That's a synopsis of how it works, and we can go more in depth. I would like to note that many will make generalizations to justify their rejection of scientific fact. What is ironic is that said people will accept that every species that has ever existed came to be at one point in time, however our fossil records bet to differ.

There are fish with bones, what happened is fish developed bones in their find, and these were capable of supporting them on shallow water. The first amphibian to come to Earth, still needed to lay their eggs in water, they still needed to be in conditions that a fish would experience. This isn't a questionable statement, this organism had an incredible advantage; no other predators would be there. Safety for them would be practically guaranteed. The topic of gills transitioning to lungs has already been explained, or I think that was about the formation of the cardiovascular system. Either way you can research these things, better than Veeky Forums answering things off the top of our heads

It is all random, lol.

I dunno.

I have no proof or research and thus is off the top of my head but I thing that the first cells were made from small bio matter this creates the first simple DNA property of dislike and like. After that it's just a matter of how many get together how developed they get and where they originate. So that being said as thousands of years pass many species arise like ing different things leading some to different areas to live for many reasons I would say from food to shelter to better movement. But once before that answering another question. There are two ways to sustain life. And living thing wants to continue in life so either Be immortal. Or reproduce. Some animals can do this singularly some are unisex and some as we all know reproduce through the sharing of DNA. I hope somebody reads this haha

m8, it was literally thousands of millions of years

BTW is evolution something pervasive in the universe of restricted only to earth, or pretty rare, why no ""life"" on Saturn

how complicated the process must be to call it life? is forming hills from sand by a wind a "life"?
maybe it is just a matter of language?

because the question, even if very interesting, is not scientific

Early arachnids were able to go on land due to legs, hard shells protecting them from the harsh UV, and weird lung flaps allowing them to keep moisture. These arachnids had an advantage due to them being the only animal around with no predators. They are believed to have monitored choke-points between fish breeding grounds in rivers, and the sea. At these estuaries they fed on the young of the fish. The fish then had their genepool altered due to this as well as other environmental pressures. Fish who were born with longer fins survived and their descendants had legs.
Organisms with features most advantageous for the environment pass on their genetics

Whenever an organism reproduces its genes mutate these mutant genes exist in the offspring, the natural world acts as a filter for genes too terrible to aid in survival and thus those set of genes become extinct, as the world changes so do the filters leading to creatures developing environmental niches like most rainforest animals. That is evolution user nothing but random mutations being filtered by nature.

One day a mutated offpspring had developed a harder notochord

Then the distant descendant of this thing developed an endoskeleton mutation, and this went on and on and on and on until you get us.

There is no path to evolution its all random but nature filters it into consistency however, we just very lucky we managed to pass all of the filters and reach this point. Also if the mutated trait persist for over a 10000 years then it now become impossible to remove thats why we cannot develop more than four limbs, five digits, and two eyes.

For example had we no ozone layer nothing would live on the land because the persisted traits of life made developing UV protection of that level biologically impossible.

>if the mutated trait persist for over a 10000 years then it now become impossible to remove

Plants colonized land before animal did

Next if trees didnt exist we would also not exist because the Primates are arboreal mammals our body shape is due to living in the tree.

As for humans the easiest way to force filters is to cool down the earth the ice age creating a filter for empathy, forethought and higher abstract reasoning is the reason behind our intelligence today without it we would just be the blacks.

You have two eyes right?

Four limbs?

Two lungs?

Five digits?

A brain?

These are all persisted traits that come from ancient ancestors user these persisted traits are what genetically connects us to rest of life on earth. A good example of a persisted trait is the humanoid body shape which is really a modification of the primate skeletal structure.

>you never saw it happen in your 20 years of life
>therefore it's true
>for a process that lasts trillions of years

Evolution is true because Bill DeNye Tyson told me so

Evolution is real nitwit compare the humans from 10,000 B.C to us and you would notice we have new sets of genes that they lack infact to the humans from 60,000 years ago we are almost genetically a new species.Just look at all the human races black people mutated melanin in their skin for UV protection, european mutated hairiness to preverse body heat, while asians mutated high body fat for heat preservation as well. Evolution is real look around you retard.

A trait persist if it spread to the entire population, and other Traits start being dependent on it. Ignore the 10k years retarded thing and shut the fuck up

Darwin's four Observations and two Deductions:

O1: The number of members of a species remains relatively constant over time

O2: Parents produce far more offspring than are needed to replace them

D1: Only some of the offspring survive to reproduce
O3: Offspring are randomly genetically varied around their parents

O4: Parents pass on their genetic traits to their offspring

D2: Only the offspring best adapted to their environment survive to reproduce again. i.e. 'Survival of the Fittest', although that's a misleading name

Hence over time, organisms become better adapted to their habitat. Speciation happens when a population is somehow divided, so for example if finches land on an island with a different environment (hint: look up Darwin's finches)

>All this shit posting on evolution
I can't imagine the reaction when we discover more on the big bang.

Evolutions a meme

Ancient astronauts theorize that an ancient alien race genetically modified dna
Literally makes more sense than evolution

Darwin didn't know about genes, so you gotta change that one a little bit

You forgot that the new traits are passed on to the next generation

and speciation happens when two groups are no longer compatible to breed anymore

>food sources are running low
>predators are coming in closer to the mainland
>the climate is settled down
>the fish are getting pushed closer to the shore, closer to the surface
>some of these fish have genetic defects
>hmm, some of the defects make them survive longer near the shoreline
>some can even evade predators
>as time goes by, these fish breed and change until they spend more time on land than in the water

Ta da!

I read and screenshoted it for future use and rereading so thank you

I have sincerely wondered how the first celled organisms replicated their DNA. I have no doubt that information can be coded through molecular formations, but what in particular manipulated these codings?

It really seems counterintuitive that little fat bubbles with strings of DNA started making decisions, even if those decisions were just "is this desireable, Y/N. If yes, pursue, if no, avoid."

Evolution plays with the strenghts of the species. Humans became the most powerful beings on Earth due to their intelligence being superior to the other beings; intelligence is fruit of physical development of memory and in consequence experience. Most humans won't go one-on-one against an elephant or a lion, but they will defeat them with strategy and a weapon such as a spear and a bow, demonstration of survival capacities. Communication is also fundamental to survival for a human is less vulnerable within a group.

The main question is what gave origin to everything? If there are particles common to all beings and things this means everything can be alive eventually.

>How did marine animals become land animals?
Plants bacteria and fungi went first creating a huge ecological niche. Then an organism living near shore needed to evolve air breathing.
en.wikipedia.org/wiki/Pneumodesmus
Might have started as thinner patches between segments allowing a little gas exchange and over time these became holes and eventually trachaea tubes.