What is the main potential benefit of batteries that utilize bacteria to generate electricity https://makezine. com/projects/microbial-fuel-cell/

When should a bar graph be used? a. when there is no independent variable. b. when the independent variable is continuous and does not show a relationship to the dependent variable. c. when the independent variable is continuous and shows a causal link to the dependent variable. d. when the independent variable is composed of categories and does not show a relationship.

Which prefix mean under less or below

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give