Based on cell theory, why is a virus considered non-living? a. a virus does not have a nucleus. b. a virus does not contain genetic material. c. a virus is too small to be considered a cell. d. a virus cannot reproduce itself without a host cell.

What do scientists need to look at before developing an argument

What is the number of phosphates in an atp molecule

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems