The rapid rise of atmospheric oxygen illustrated in the geological record by layers of iron oxides.
The two types are Dna, and fossils
Charles Robert Darwin, of course!
as a change in an individual's phenotype in response to an environmental challenge
Actually, it is the strongest evidence for evolution. Without one fossil we would know from the DNA evidence that evolution has occurred and is occurring. It is in the DNA of organisms that we see the strongest evidence for common ancestry. The products of those genes are sometimes highly conserved down the ages. Ribosomes, the workbenches on which proteins are made, differ hardly at at between you and pets.
The first eukaryotic organisms were formed by the process known as endosymbiosis whereby once independent microorganisms entered cells of other independent microorganisms and established symbiotic relationships with each other.
The evolution of photosynthetic organisms, such as cyanobacteria, led to the buildup of oxygen in Earth's atmosphere through a process called the Great Oxidation Event. This occurred around 2.4 billion years ago, gradually transforming the atmosphere from anaerobic to aerobic.
Scientists have believed that chemical evolution occurred about 4 billion years ago, shortly after the formation of the Earth. This process is thought to have led to the development of the first life forms on our planet.
evolution
Scientists believe that chemical evolution occurred around 3.5 billion years ago.
The two types are Dna, and fossils
During the Precambrian period, significant changes occurred in the atmosphere. Early in the period, the atmosphere was primarily composed of gases like methane, ammonia, and carbon dioxide with little to no oxygen. But over time, due to the emergence of photosynthetic bacteria, oxygen levels began to rise, leading to the development of an oxygen-rich atmosphere by the end of the Precambrian. This rise in oxygen was a major milestone in Earth's history, paving the way for the evolution of complex multicellular life forms.
Yes.
B and C only for plato users
Reptiles evolved from amphibians
The two types are Dna, and fossils
The two types are Dna, and fossils
What is the mechanism that causes evolution. Both knew evolution occurred and occurs but did not know how or why. Lamark's " desire to evolve " and " acquired characteristics " failed to explain evolution. Darwin's theory of evolution by natural selection was the better explanation.