When oxygen is not present respiration occurs, this can also be called . There are two types of fermentation: and These two processes only gain a total of ATP.

it takes hundreds of years to become stable.

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it is called the mitotic spindle

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.