Answer:
Photosynthetic organisms was the reason of these atmospheric changes.
Explanation:
The plant which is discovered by the scientists that is apparently devoid of life but has ice caps located at the poles which reveals that planet's atmospheric O₂ levels sharply increased about 1,000,000 years ago was due to evolution of photosynthetic organisms like cyanobacteria etc which went extinct and then O₂ levels dropped quickly 50,000 years ago. So photosynthetic organisms was the reason of these atmospheric changes.
Answer:
unconfined, confined
Explanation:
These are the diffences between them.
They're called resin identification codes, and they indicate the type of plastic that an item is made from. These numbers alone do not indicate whether a package is recyclable, but can be used in conjunction with instructions from your community to help you know the types of plastics can be recycled where you live.
The peninsula between North Korea and South Korea was established by the Demilitarized Zone between 1950-1953 So the answer is D
