curquest said:
how do we know this if evolution says it happened millions and millions of years ago?
Because the events left evidence that persists to the present. The oldest fossils are 3.8 billion years old. They are in sedimentary rock. In order to have sedimentary rock you have to have erosion of other rock and the way you get erosion is by water. Rocks that form from blowing dust have characteristics that show that. For instance, look at the Coconino sandstones. They were formed from sand deposited by wind erosion.
So, there was water present.
a human live without lungs or without a heart if they didnt take evolve together or any other body part.
As I said, the organs were in place in our remote ancestors. For instance, we evolved from mammals. Mammals have all the organ systems we have. Mammals evolved from reptiles and that is one of the best transitional species sequences there is. Reptiles have the organs. They didn't have the ears, but we can see that evolve step by step in the transitional species.
how does the jellyfish move around then without a brain? arent brains what make u able to move?
Paramecium and amoeba move. They are single-celled and don't have a brain. Movement involves changes in proteins inside cells. For muscle cells it's the contraction of proteins inside those cells. You don't need a brain to tell muscle cells to contract. All you need do is trigger the chemical reactions inside those cells. An outside stimulus that is not a brain will do it.
In fact, in humans, our reflexes don't depend on our brain. Tap your knee with that rubber hammer doctors use and your leg moves without any part of your brain being involved.
can u show me evidence for this, sounds interesting
when did this take place? how was it observed?
A lot of evolution is deduced by studying living organisms and then looking for their relatives in the fossil record. You see, it is possible for a species to earn quite a good living without being as complex as a human. So organisms that got to these partial stages were able to stay there because that way of earning a living is still around.
We have indications that worms existed over 1
billion years ago. Worms have digestive systems. We have many fossils from 600 million years ago -- the Eidacarian fossils -- that show some soft tissue detail including digestive tracts and the beginnings of the circulatory system.