Before viruses can reproduce, they must

a. replicate the contents of their nucleus. b. undergo binary fission. c. infect a host cell. d. initiate the cell cycle.

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Before viruses can reproduce, they must infect a host cell.

Viruses need a way to enter the body before they can infect a host cell.

Before viruses can reproduce, they must infect a host cell.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added