Why is the mandatory reliance on a host cell considered a successful, energy-saving strategy for viruses?

Answer

Because the virus avoids the evolutionary cost of developing its own synthesis machinery.

This reliance is an evolutionary trade-off; the virus exchanges structural simplicity for exploiting an already functioning, highly optimized cellular factory, saving the energy required to develop its own metabolic enzymes.

Why is the mandatory reliance on a host cell considered a successful, energy-saving strategy for viruses?

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How Do Viruses Reproduce? - YouTube

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