Depends on how low you are talking. Yes some people can survive with relatively low oxygen saturations, by compensating in other ways (ie increase the number of red blood cells).
Up to 10 minutes
2 weeks
I believe only a couple of minutes.
Yes they can as long is they have nutrients to live off of ...and oxygen...
The average human can survive under water for approximately 5 minutes but no more then 10.
humans can survive for at least 100 years minimum 50 maximum 150
Humans need oxygen. However, if the travel is unmanned, no oxygen would be required.
Oxygen. But an organism will not survive long on just oxygen.
4 days or less.
That totally depends on your definition of life. The short answer: None.The long answer: Millions of years ago the planet Earth had little oxygen to speak of, and anerobic bacteria (those that didn't breathe oxygen) was the dominant form of life. Then came along what's known as "The Great Oxygenation", in which Earth's atmosphere started becoming more oxygen-based. Once oxygen did appear, the oxygen breathers typically outdeveloped and outbreeded other forms of life, which if I recall correctly has something to do with oxygen being far more efficient for certain biological processes than other elements such as methane.So it's not that life actually needs oxygen to survive, it's just that oxygen is far more efficient for certain biological processes -- when it's actually available. This does not answer the question. The answer is 18% oxygen at sea level. Source: PADI's Enriched Air Divers Manual
Not long with oxygen, about two seconds without it.
Humans could survive over 135 degrees if it wasn't for very long and they remained well hydrated. That is the key, they have to have enough water to combat dehydration.