OXYGEN
PRESENT ABSENT
Pick under
The change in color of the inner fleshy part of an
Apple rusting of iron
Fish kill
Put off candle in a covered jar
Burning piece of wood
Darkening of sliced eggplant
Burning of paper
Rusting of nails
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Answer:
1.present
2.present
3.absent
4.present
5.present
6.present
7.present
8.present