Answer:
Explanation:
Cell theory is a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells
ex. Any animal
Cell Theory is a theory that was made in the 19th century that living organisms are made up of cells ( Organisms are animals, plants, and fungi)
Example: Bacteria
Oxygen is reduced, gaining electrons and hydrogen ions. -second choice
For solid it could be melting into a liquid
for gas it could be Evaporating into a liquid
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