When cells start to swell up with water, Osmosis takes place.
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hope this helps :)</span>
Well the answer is Phagcytosis but I see that is not an answer choice
Answer:
Photosynthetic organisms were making oxygen, but it reacted with the iron dissolved in seawater to form iron oxide minerals on the ocean floor, creating banded iron formations. ... The oxygen that is now in the Earth's atmosphere was not there at the beginning.
Explanation:
