It is so because, the oldest fossils are obtained from the life forms which used to exist at that time in the oldest ages.
At that time there was no so much changes in the world, the life forms being simpler. As the age of the earth advanced hence the forms of life also adapted or tried to adapt to the changes of the surrounding.
The climate changed and so did the life forms. It was determined that in the older times, 1st life forms came in the water bodies and then from there the land forms developed. So as we see the later life forms are more complicated, thus the oldest fossils are more simpler compared to their most recent counterparts.
The oldest known fossils are prokaryotic. These fossils, dating back over 3.5 billion years, are believed to be ancient bacteria and archaea. Eukaryotic cells are thought to have evolved later.
The worlds oldest fossils were found in an ancient beach in Austrila, they are 3.4 billion years old and are fossils of cells. They have no bones and are mineralized spheres.
Agnatha, also known as jawless fish, are the oldest vertebrate fossils with no jaws. This group includes ancient species like the ostracoderms and the agnathan fish.
The oldest fossils can typically be found in sedimentary rock layers, specifically in locations with well-preserved rocks that have not undergone significant geological activity like metamorphism. These fossils provide valuable insight into the Earth's early history and the evolution of life.
The oldest terrestrial insect fossils are found in rocks dating back to the Devonian Period, approximately 400 million years ago. These fossils provide insight into the early evolution and diversification of insects on land.
It is called so because it is the oldest winged insect alive. Its fossils are 350 million years old.
Stromatolites.
The verb in the sentence is "identified." It is the action that is being carried out in the sentence.
The oldest known fossils are prokaryotic. These fossils, dating back over 3.5 billion years, are believed to be ancient bacteria and archaea. Eukaryotic cells are thought to have evolved later.
The fossils of the oldest life forms can be found in the Precambrian period of the fossil record.
The oldest humanoid fossils were all found in Africa.
Oldest plant Rough Horsetail (Equisetum hyemale) 150 million years old and they are considered living fossils The oldest flower is Montsechia vidalii existed approximately 130 million years ago and it no longer exists
The oldest micro fossils are comprised of carbon. This is because they have been in the ground a very long time and it compresses the materials into carbon.
The oldest known fossils are up to 3.5 billion years old.
Africa
The 4th layer of soil >.<
My grandfather is my oldest living descendant.