Plz
what event began the paleozoic era

question 1 options:

agriculture

fish ate all of the blue green algae.

bacteria released oxygen into the atmosphere.

Bacteria released oxygen into the atmosphere

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.