This blood vessels brings blood toward the heart

If the singular term ends in -us, the plural is usually formed by changing the ending to

Viruses ) manufacture their own atp, proteins, and nucleic acidsb) use the host cell to copy themselves and make viral proteinsc) use the host cell to copy themselves and then viruses synthesize their own proteinsd) metabolize food and produce their own atp

Someone with my pe hw i need it for tomorrow