Answer:
The correct answer is - the long evolution of discoveries and invention leads us to modern microbiology and with all of these inventions we are able to study and control microflora to this extent,
Explanation:
Microbiology is a very vast subject and is developed over a long period since the invention of the microscope took place we are able to find different microbes that cause disease or can help in understand and study the microbes.
Antony Van Leeuwenhoek - developed microscopes and called microbes animucules
Louis Pasteur (1822-1895) - fermentation, disapproved of spontaneous generation, killing bacteria with heat or pasteurization.
Edward Jenner (1749-1823) - variolation and father of immunology
Robert Koch (1843-1910) - find out the bacteria and demonstrarted the role of disinfectant, father of microbiology.
CO2 or carbon dioxide is an example of a compound element. A compound element is formed into a new substance when two or more elements are chemically combined. One of the most common examples is CO2 or carbon dioxide. The elements combined are carbon and oxygen.
Answer:
The answer is helium (mixed with oxygen and not just helium)