Why is meiosis necessary in a sexual life cycle?

Are the earth's ocean floor and continents the same age geologically? why or why not?

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.

How water is moving through the ecosystem ?