Oceans help: keep worldwide temperatures , reduce atmospheric CO2, minimize rapid temperature fluctuations, all of the above

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.

Ijust took the test on edgenuity and the answer is "life would cease to exist". hope this !