A bacterium to which oxygen is cytotoxic is known as an obligate anaerobe.
If humans killed ALL plants on earth, we would all suffocate. This is because plants convert co2 (carbon dioxide), which is exhaled by all animals, back into oxygen through photosynthesis. If they didn't convert co2, the earth's oxygen supply would depleat and we would fill the atmosphere with co2, and we would have no oxygen.
The atmosphere in an area where a disease killed all the plants would not have any or very little oxygen. Trees would still produce some oxygen.
The more water moves the more it has a big surface of contact with the air with is rich in oxygen and therefore oxygenates the water. Also the movement makes that the deeper waters have a chance to get to the surface, exposing to the air part of water that would not be exposed otherwise.
we would die (because the meat eater dinosaurs would eat us or the plant eater dinosaurs would eat all the trees and trees produce oxygen
he would be killed
ozone can be prepared from oxygen by by passing electric discharge through oxygen gas. it is necessory to use silent discharge because sparking would generate heat energy which decomposes ozone produced. the apparatus used for converting oxygen into ozone is known as ozonizer.
Roman and Egytian slaves would usually be killed if one of their number had killed their master but no other slaves would be killed unless that wish was in their will.
They would be killed by other means
the volturi sees that they outnumbered and that they're Powers are useless by Bella's shield so they decide to go to pike a fight with someone else
Oxygen would re-light a glowing splint
Of course. Ur not exposing ur self to anything you would not normally
Lack of diversity (inbreeding) exposing genetic weaknesses. A good example would be pedigree dogs.