Most eubacteria are because most rely on nutrition from other organisms.

heterotrophic(Heterotrophic Eubacteria are among the most abundant and diverse bacteria on Earth,)

Explanation:

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scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

a physical change is being made.