Which statement best explains how convection currents work in Earth's mantle? Cool, denser mantle rises, while hotter, less-dense mantle drops.

Hot, less-dense mantle rises, while cooler, denser mantle drops.

Cool, less-dense mantle rises, while hotter, denser mantle drops.

Hot, denser mantle rises, while cooler, less-dense mantle drops.

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.