Which statement about the domain Archaea is true?
A) Genetic prospecting has recently revealed the existence of many previously unknown archaean species.
B) No archaeans can reduce CO2 to methane.
C) The genomes of archaeans are unique, containing no genes that originated within bacteria.
D) No archaeans can inhabit solutions that are nearly 30% salt.
E) No archaeans are adapted to waters with temperatures above the boiling point.

Question

Quizplus · Accepted Answer

Genetic prospecting has revealed the existence of many previously unknown archaean species. This is a true statement about the domain Archaea.

Answer: B, C, D, E 
 Statements B, D, and E are false as there are known archaeans that can reduce CO2 to methane, inhabit solutions that are nearly 30% salt, and are adapted to waters with temperatures above the boiling point. Statement C is also false as some genes found in archaea have been shown to have originated from bacteria through horizontal gene transfer. Therefore, none of the statements are true about the domain Archaea.

Which Statement About the Domain Archaea Is True