In recent years we've learned a whole lot more about those other prokaryotes, the Archaea. Answer true or false to the following statements:
a. All archaea are extremophiles.
b. Archaea are the only extremophiles.
c. An extremophile is only found in the prokaryotic world.
d. Extremophiles can be found in all three domains of life.
Extremophiles are organisms that live in extreme conditions. These conditions include extreme cold, extreme heat, extremes of pH, salinity, pressure etc. It is believed that the first life on Earth was extremophiles.
Answer and Explanation:
a. All archaea are extremophiles. True.
b. Archaea are the only extremophiles. False. Bacteria and Eukarya can also be extremophiles.
c. An extremophile is only found in the prokaryotic world. False. As stated above, eukaryotes can be extremophiles as well.
d. Extremophiles can be found in all three domains of life. True.
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from Microbiology: Help and ReviewChapter 5 / Lesson 21