a. Given: Cells of the bacterium Pseudomonas fluorescens are attached to a rock in a lake. Therefore, P. fluorescens is considered to be part of the biofilm. True/False b. Given: Pseudomonas fluorescens can consume glucose and acetate as its carbon source. Therefore, it is an autotroph. True/False c. Microorganisms that are floating on the top of a lake are more likely to be carrying out anaerobic respiration as compared to aerobic respiration. True/False d. In lake sediments, where oxygen is absent, microorganisms are more likely to be carrying out anaerobic respiration as compared to aerobic respiration. True/False c. Based on their relative sizes, it would be more likely to find a bacterium inside an amoeba (a type of protozoa) rather than an amoeba inside a bacterium. True/False