How can bacteria be used to clean up pollutants?

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Abnormal softening of a gland is known as

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.