Question

Which of the following extremophiles might researchers most likely use as a model for the earliest organisms on Earth?
A) a bacterium found on another planet or moon
B) an archaean capable of surviving in the polar ice caps
C) an anaerobic archaean species
D) a bacterium that thrives in a highly acidic environment
Answer: A

please explain the reason

Answer 1

The correct answer is

C) an anaerobic arches species

Reason: we are well aware that Earth's primordial atmosphere was Anoxic in comparison to present day conditions. Also Archaea are the oldest living organisms on the Earth. Archae are also able to use different sources if energy ranging from organic compounds such as sugars to ammonia, metal ions and even hydrogen gas