Which of the following is the minimum level of structure needed to perform the function of waste removal. 1: body system. 2: tissue. 3: cell. 4: organ

1. which of the following transport mechanisms utilizes energy? a. osmosis b. diffusion c. facilitated diffusion d. endocytosis

Which of the following may one conclude from a map that shows the average ph value of rainfall in the u. s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u. s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u. s.

Which is the following can combine in a cell to convert a lower-energy molecule into a higher-energy molecule?