A bacterium, such as E.coli is extremely sensitive to changes in its environment. Which of the following changes might a bacterium have to perceive and respond to?

a) change in the light intensity of the intracellular environment
b) change in the pH of the intracellular environment
c) increase in the surface area of the cell wall
d) change in the solute concentration in the extracellular environment
e) increase in electric impulses


Ans: d) change in the solute concentration in the extracellular environment

Biology & Microbiology

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