Anton van Leeuwenhoek, using the microscope, was the first to observe bacteria and protozoa.
The answer to this question is Carbon Dioxide. The ocean releases carbon dioxide from decaying plants and the output of underwater respiration while the atmosphere has oxygen that the ocean's water then chemically absorbs, so it can be used for the underwater life and the cycle can continue this vital exchange of resources.
Answer:
It is how something has been developing/developed over a certain time period starting off simple to become something composite. It has an advancement or growth to it. In other words it is something that progresses throughout time and has a change in transformation.
Talk to someone higher than her in status in the job?
The history of dialysis dates back to the 1940s. The first type of dialyzer, then called the artificial kidney, was built in 1943 by Dutch physician Willem Kolff. Kolff had first gotten the idea of developing a machine to clean the blood after watching a patient suffer from kidney failure.