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The Lake of the Ozarks is a human-made lake, so it collects runoff from coal strip-mining, fertilizers, resort wastewaters, and septic drainages. The average lake temperature is between 10∘C and 21∘C. Consider the physical requirements for growth and multiplication that would allow fecal coliforms to "blossom" in the Lake of the Ozarks. Which of the following would accurately describe these organisms? Check all that apply. View Available Hint(s) Check all that apply. Extremophiles Mesophiles Hyperthermophiles Psychrophiles

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Answer:

Mesophiles

Psychrophiles

Extremophiles

Explanation:

The most prominent physical requirements for microbial growth are:

  1. Temperature
  2. pH
  3. Osmotic pressure

Extremophiles are organisms that thrive in harsh, unfavorable and even toxic environments.

Since the Ozark Lake fecal coliforms are capable of withstanding temperatures as low as 10°C, they are classified as psychrophiles i.e. "cold loving". On the other hand, they can also thrive at 21°C which is a moderate temperature. Therefore, they will also be classified as mesophiles i.e. "middle loving"

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