Methanopyrus kandleri is an organism which lives in a hydrogen-carbon dioxide environment, and was first discovered in a hydrothermal vent where temperatures reached 230°F. What sort of organism is this?

Explanation

This question requires the candidate to make use of his/her analytical skills, by co-relating the concepts studied in Kingdom Prokaryote. We know that Archae are those organisms which are able to survive in extreme temperature conditions and, the question mentions a high temperature of upto 210 F. Most of the candidates won't know the example mentioned, but they should be able to recognize the concept asked. Thus, Archae is the correct option.