Today I will talk about the two main things used as evidence for evolution are Fossil record and Comparative embryology both of these things are used to see where different organisms originate from, how long they have been around and how they have developed over time.
Fossils are the preserved remnants or traces of extinct animals, plants, and other species. The age of fossils ranges from 10,000 to 3.48 billion years. Geologists in the 19th century first noticed a geological timeline when they noticed that specific fossils were connected to specific rock strata. Similar to living things, fossils come in a wide range of sizes, from microscopic—like single-celled bacteria—to enormous—like dinosaurs and trees.
The fossil record includes all fossils, both known and unknown, as well as where they are located in strata and fossiliferous (rock formations that contain fossils). The fossil record was one of the earliest data sources used to support the study of evolution and is still important for understanding the evolution of life on Earth.
Indisputable proof that ancient organisms were distinct from those seen now can be found in fossils, which also demonstrate the evolution of various species. The morphological, or anatomical, record is made up of fossils and the comparative anatomy of living animals today.
The study of embryos is known as embryology. The resemblance of embryos in distinctly different species is proof of an evolutionary common ancestor. Darwin based his conclusions on the study of embryology.Even though the adult forms of different species within a class do not resemble one another, embryos and the development of those embryos have similarities. For instance, in the early stages of embryonic development, human and chicken embryos resemble one another. The 60 per cent of protein-coding genes that humans and chickens share an ancestor is thought to be the cause of these early similarities.