Life on the ground

 Life on Earth was 200 billion years ago, but its lions have spent long time in the water. It is only the sea water again. In  the history of about 100 billion years, in the history of the sea, in  the history of the life of the sea in the waters of the sea. At that time the land was not in favor of life. At that time there were many problems for the organism on the ground. Sun's ultraviolet rays were always harmful for animals. To prevent this, the ozone layer at the present time was not in the sky in the past. But water can absorb ultraviolet rays. That is why, in the past, only animals survived in the water, it was not possible on the ground in the absence of weight level. In the absence of oxygen, in the past it took time to form the atmosphere-ozone layer. There was another problem with the organism on the ground, drying water in the body. If the body does not have sufficient water, then the organism can not survive. If you are drowning in the water do not be afraid to dry. To  solve this problem in the soil such as water management, water has to  be created to keep water in the water - through which the water can not  get windy. So it was not possible to survive the destruction of the organism until it was done. Even  when the amphibious insects meant that triloobiros came to the ground,  they were still near the water and started laying eggs in the water at  the beginning. As long as the egg was not stored in the egg for the child, it was not possible to lay eggs on the ground. Since oxygen is dependent, the exchange of carbon dioxide in oxygen is another essential biological demand of the organism. With  sufficient water in direct contact with the water, it is possible to  release carbon dioxide directly with dissolved oxygen from the water. To do this from the air in the air, there is no need for a lung equivalent system. The gas exchange is possible in the air, but it is possible to exchange gas in the lungs. It was not possible to live on the ground until such a system was developed. There were also more point problems on the way to the landbank. Such as the problem of body waste disposal. Water can be done by drinking very low energy. The main reason for this is the development of transmitted organisms in the water mainly ammonia. It is poisonous for the body but it takes less energy to make it. Because the toxic chemicals and water were washed away. On the other hand, there is no need to remove this type of hoop on the ground. So she has to make less poisonous bods. For example, urea, uric acid etc., which can be kept in the body for the rest of the day after leaving it as excreta. But the problem is that there is a need for more energy to create such complex intake. That is, the need for more energy to break the body's waste. Carrying your body weight is also a problem of soil organisms, especially if the body is bigger and heavier. The  water and the weight are to be carried by water in the water where the  living creatures have to rely on the body in this case. As long as the mass of the body increases in proportionality and volume increases. That's why the limitation of the animals of the animals has remained limited. The largest animal in the water, blue whales or squid is the largest animal in the body, it can be easily grown from the hand. For  the same reason breaking bread was also difficult for the organism in  the ancient times, especially in the case of big animals. Because  at that time, the amount of soil on the surface was less than that of  this era, but with the same challenges faced, the creatures on the  ground have come and this has developed further. A group of creatures from the earth have risen in the sky and have been planted in the trees. And in this case, the role of a pioneer was a branch of the trilobaite named Yuris Stethis. Therefore,  in the middle of the Silurian State, about 4 billion years ago, all  major changes in the development of the organism took place.