Answer:
Evolution by natural selection.
Explanation:
According to Charles Darwin's theory of evolution by natural selection, some organisms possesses heritable traits that enable them to adapt to their environment compared with other members of their species. This will be more likely to survive, reproduce, and pass more of their genes on to the next generation.
Most scientists believe that for half of Earth's 4.6-billion-year history, the atmosphere<span>contained almost no </span>oxygen. Cyanobacteria or blue-green algae became the first microbes to produce oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.
this answer came from this website </span>The Rise of Oxygen - Astrobiology Magazine<span>www.astrobio.net/news-exclusive/the-rise-of-oxygen/
it should help</span>
Answer: temperature
Pasteur is also credited with the process of pasteurization which removes pathogens from consumable liquids, reducing temperature and subsequent illness.
Explanation:
Pasteurization involves treatment of a consumable food with
- heat to destroy the cells of disease-causing pathogens
- followed by immediate cooling (reducing temperature) to limit growth of the surviving cells and germination of spores.
Robert Hooke built his own compound microscope to examine tree bark.
