Streak, color, luster, crystal structure.
The correct answer is - cyanobacteria.
The atmospheric oxygen came from the cyanobacteria. These were one of the earliest living organisms on Earth. The cyanobacteria was using photosynthesis in order to create its own food. The photosynthesis process requires sunlight, carbon dioxide, water, and oxygen. The oxygen is mostly released as a waste product from the process of photosynthesis, thus the cyanobacteria were literally releasing oxygen that was ending up into the atmosphere. As more and more cyanobacteria there were across the planet, more and more oxygen they were releasing into the atmosphere, slowly changing the composition of the atmosphere, and setting the basis of it as we know it now.
A fact is a pragmatic truth, a statement that can, at least in theory, be checked and confirmed. Facts are often contrasted with opinions and beliefs, statements which are held to be true, but are not amenable to pragmatic confirmation.The word fact derives from the Latin Factum, and was first used in English with the same meaning: "a thing done or performed", a use that is now obsolete. The common usage of, "something that has really occurred or is the case", dates from the middle of the sixteenth century. Fact is sometimes used as synonymous with truth or reality, as distinguishable from conclusions or opinions. This use is found in such phrases Matter of fact, and "... not history, nor fact, but imagination."
Answer:
<h3>It happens when a population ages an increase in the population's mean and median ages.</h3>
